./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS --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 b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- 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-8393723 [2022-11-19 07:40:13,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:40:13,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:40:13,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:40:13,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:40:13,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:40:13,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:40:13,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:40:13,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:40:13,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:40:13,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:40:13,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:40:13,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:40:13,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:40:13,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:40:13,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:40:13,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:40:13,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:40:13,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:40:13,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:40:13,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:40:13,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:40:13,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:40:13,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:40:13,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:40:13,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:40:13,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:40:13,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:40:13,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:40:13,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:40:13,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:40:13,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:40:13,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:40:13,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:40:13,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:40:13,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:40:13,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:40:13,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:40:13,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:40:13,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:40:13,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:40:13,673 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:40:13,710 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:40:13,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:40:13,711 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:40:13,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:40:13,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:40:13,712 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:40:13,712 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:40:13,712 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:40:13,713 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:40:13,713 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:40:13,714 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:40:13,714 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:40:13,714 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:40:13,715 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:40:13,715 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:40:13,715 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:40:13,715 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:40:13,715 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:40:13,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:40:13,716 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:40:13,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:40:13,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:40:13,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:40:13,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:40:13,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:40:13,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:40:13,719 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:40:13,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:40:13,720 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:40:13,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:40:13,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:40:13,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:40:13,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:40:13,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:40:13,722 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:40:13,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:40:13,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:40:13,722 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:40:13,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:40:13,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:40:13,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:40:13,723 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_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2022-11-19 07:40:14,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:40:14,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:40:14,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:40:14,053 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:40:14,055 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:40:14,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2022-11-19 07:40:14,122 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/data/62dc6eb4c/ec8a048fc31a4b548602b6e602c260eb/FLAG69834ae5c [2022-11-19 07:40:14,574 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:40:14,575 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2022-11-19 07:40:14,581 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/data/62dc6eb4c/ec8a048fc31a4b548602b6e602c260eb/FLAG69834ae5c [2022-11-19 07:40:14,596 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/data/62dc6eb4c/ec8a048fc31a4b548602b6e602c260eb [2022-11-19 07:40:14,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:40:14,600 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:40:14,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:40:14,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:40:14,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:40:14,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:14" (1/1) ... [2022-11-19 07:40:14,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@189fa5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:14, skipping insertion in model container [2022-11-19 07:40:14,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:14" (1/1) ... [2022-11-19 07:40:14,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:40:14,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:40:14,869 WARN L234 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_d0f30e60-e7b0-45df-a711-af785a49a38a/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2022-11-19 07:40:14,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:40:14,903 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:40:14,918 WARN L234 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_d0f30e60-e7b0-45df-a711-af785a49a38a/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2022-11-19 07:40:14,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:40:14,954 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:40:14,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:14 WrapperNode [2022-11-19 07:40:14,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:40:14,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:40:14,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:40:14,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:40:14,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:14" (1/1) ... [2022-11-19 07:40:14,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:14" (1/1) ... [2022-11-19 07:40:14,998 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-11-19 07:40:14,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:40:14,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:40:14,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:40:15,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:40:15,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:14" (1/1) ... [2022-11-19 07:40:15,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:14" (1/1) ... [2022-11-19 07:40:15,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:14" (1/1) ... [2022-11-19 07:40:15,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:14" (1/1) ... [2022-11-19 07:40:15,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:14" (1/1) ... [2022-11-19 07:40:15,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:14" (1/1) ... [2022-11-19 07:40:15,032 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:14" (1/1) ... [2022-11-19 07:40:15,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:14" (1/1) ... [2022-11-19 07:40:15,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:40:15,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:40:15,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:40:15,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:40:15,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:14" (1/1) ... [2022-11-19 07:40:15,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:40:15,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:15,079 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:40:15,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:40:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:40:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:40:15,125 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:40:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:40:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:40:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:40:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:40:15,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:40:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:40:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:40:15,213 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:40:15,216 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:40:15,395 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:40:15,436 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:40:15,436 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:40:15,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:15 BoogieIcfgContainer [2022-11-19 07:40:15,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:40:15,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:40:15,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:40:15,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:40:15,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:40:14" (1/3) ... [2022-11-19 07:40:15,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d06522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:15, skipping insertion in model container [2022-11-19 07:40:15,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:14" (2/3) ... [2022-11-19 07:40:15,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d06522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:15, skipping insertion in model container [2022-11-19 07:40:15,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:15" (3/3) ... [2022-11-19 07:40:15,447 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2022-11-19 07:40:15,466 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:40:15,466 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:40:15,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:40:15,521 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;@18fc8e30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:40:15,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:40:15,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:40:15,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:40:15,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:15,534 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:15,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:15,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:15,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1661147299, now seen corresponding path program 1 times [2022-11-19 07:40:15,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:15,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179779135] [2022-11-19 07:40:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:15,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:40:15,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:15,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179779135] [2022-11-19 07:40:15,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179779135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:40:15,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:40:15,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:40:15,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466453315] [2022-11-19 07:40:15,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:40:15,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:40:15,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:16,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:40:16,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:40:16,012 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:40:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:16,125 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-11-19 07:40:16,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:40:16,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2022-11-19 07:40:16,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:16,135 INFO L225 Difference]: With dead ends: 32 [2022-11-19 07:40:16,136 INFO L226 Difference]: Without dead ends: 23 [2022-11-19 07:40:16,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:40:16,143 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:16,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 25 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:40:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-19 07:40:16,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2022-11-19 07:40:16,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:40:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-19 07:40:16,184 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2022-11-19 07:40:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:16,185 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-19 07:40:16,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:40:16,185 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-19 07:40:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:40:16,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:16,187 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:16,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:40:16,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash -279186300, now seen corresponding path program 1 times [2022-11-19 07:40:16,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:16,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566752040] [2022-11-19 07:40:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:16,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:40:16,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:16,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566752040] [2022-11-19 07:40:16,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566752040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:16,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39227723] [2022-11-19 07:40:16,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:16,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:16,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:16,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:16,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:40:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:16,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:40:16,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:17,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:40:17,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:40:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:40:17,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:17,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:40:17,547 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 24 treesize of output 20 [2022-11-19 07:40:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:40:17,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39227723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:40:17,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1396638972] [2022-11-19 07:40:17,719 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:40:17,720 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:17,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:17,731 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:17,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:17,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:17,901 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:40:17,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:40:17,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:17,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:40:18,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:18,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:40:18,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:18,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:18,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:18,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:18,931 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:40:18,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:40:19,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:40:19,242 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:40:19,245 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:40:20,477 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '208#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:40:20,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:40:20,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:40:20,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 17 [2022-11-19 07:40:20,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775791811] [2022-11-19 07:40:20,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:40:20,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:40:20,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:20,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:40:20,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:40:20,487 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-19 07:40:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:20,828 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-11-19 07:40:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:40:20,829 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 18 [2022-11-19 07:40:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:20,832 INFO L225 Difference]: With dead ends: 37 [2022-11-19 07:40:20,832 INFO L226 Difference]: Without dead ends: 35 [2022-11-19 07:40:20,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:40:20,837 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:20,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 73 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:40:20,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-19 07:40:20,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2022-11-19 07:40:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:40:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-11-19 07:40:20,855 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 18 [2022-11-19 07:40:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:20,855 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-11-19 07:40:20,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-19 07:40:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-11-19 07:40:20,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 07:40:20,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:20,858 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:20,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:40:21,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:21,064 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:21,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:21,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2118100484, now seen corresponding path program 1 times [2022-11-19 07:40:21,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:21,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636614947] [2022-11-19 07:40:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:21,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:40:21,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:21,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636614947] [2022-11-19 07:40:21,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636614947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:21,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497111852] [2022-11-19 07:40:21,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:21,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:21,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:21,194 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:21,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:40:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:21,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:40:21,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:40:21,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:40:21,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497111852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:40:21,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1167047443] [2022-11-19 07:40:21,360 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:40:21,360 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:21,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:21,361 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:21,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:21,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:21,464 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:40:21,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:40:21,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:21,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:40:21,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:21,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:40:22,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:22,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:22,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:22,258 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:40:22,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:40:22,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:40:22,514 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:40:22,516 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:40:23,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '446#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:40:23,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:40:23,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:40:23,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-19 07:40:23,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338097903] [2022-11-19 07:40:23,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:40:23,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:40:23,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:40:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:40:23,527 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 07:40:23,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:23,604 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-11-19 07:40:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:40:23,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-19 07:40:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:23,605 INFO L225 Difference]: With dead ends: 40 [2022-11-19 07:40:23,606 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 07:40:23,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:40:23,607 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:23,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 44 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:40:23,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 07:40:23,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2022-11-19 07:40:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:40:23,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-19 07:40:23,614 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 21 [2022-11-19 07:40:23,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:23,614 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-19 07:40:23,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 07:40:23,614 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-19 07:40:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 07:40:23,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:23,615 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:23,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:23,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-19 07:40:23,822 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:23,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1891214013, now seen corresponding path program 2 times [2022-11-19 07:40:23,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:23,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764876671] [2022-11-19 07:40:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:23,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:40:24,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:24,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764876671] [2022-11-19 07:40:24,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764876671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:24,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422777142] [2022-11-19 07:40:24,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:40:24,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:24,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:24,287 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:24,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:40:24,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:40:24,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:40:24,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 07:40:24,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:24,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:40:24,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:40:24,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-19 07:40:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:40:24,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:24,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422777142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:24,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [865899496] [2022-11-19 07:40:24,855 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:40:24,855 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:24,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:24,856 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:24,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:24,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:24,944 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:40:24,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:40:24,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:24,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:40:25,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:25,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:40:25,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:25,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:25,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:25,651 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:40:25,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:40:25,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:40:25,845 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:40:25,846 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:40:26,966 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '649#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:40:26,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:40:26,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:40:26,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2022-11-19 07:40:26,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550036328] [2022-11-19 07:40:26,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:40:26,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:40:26,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:26,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:40:26,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:40:26,969 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 19 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-19 07:40:27,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:27,454 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-11-19 07:40:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:40:27,457 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 23 [2022-11-19 07:40:27,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:27,458 INFO L225 Difference]: With dead ends: 50 [2022-11-19 07:40:27,458 INFO L226 Difference]: Without dead ends: 48 [2022-11-19 07:40:27,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=267, Invalid=1713, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 07:40:27,460 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 60 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:27,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 70 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 205 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-11-19 07:40:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-19 07:40:27,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2022-11-19 07:40:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 07:40:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-11-19 07:40:27,473 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2022-11-19 07:40:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:27,473 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-11-19 07:40:27,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-19 07:40:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-11-19 07:40:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 07:40:27,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:27,475 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:27,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:27,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:27,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:27,683 INFO L85 PathProgramCache]: Analyzing trace with hash 229839077, now seen corresponding path program 2 times [2022-11-19 07:40:27,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:27,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321984859] [2022-11-19 07:40:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:27,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:40:28,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:28,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321984859] [2022-11-19 07:40:28,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321984859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:28,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715895912] [2022-11-19 07:40:28,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:40:28,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:28,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:28,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:28,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:40:28,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:40:28,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:40:28,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 07:40:28,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:28,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 07:40:28,567 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 07:40:28,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2022-11-19 07:40:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:40:28,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:28,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:40:28,718 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 24 treesize of output 20 [2022-11-19 07:40:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:40:29,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715895912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:40:29,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [547629628] [2022-11-19 07:40:29,067 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:40:29,067 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:29,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:29,068 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:29,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:29,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:29,179 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:40:29,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:40:29,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:29,231 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:40:29,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:40:29,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:29,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:40:29,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:29,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:29,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:29,945 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:40:29,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:40:30,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:40:30,152 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:40:30,155 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:40:31,301 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '975#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:40:31,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:40:31,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:40:31,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 27 [2022-11-19 07:40:31,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653732208] [2022-11-19 07:40:31,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:40:31,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 07:40:31,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:31,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 07:40:31,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1303, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:40:31,305 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 21 states have internal predecessors, (38), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-19 07:40:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:31,926 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-11-19 07:40:31,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:40:31,927 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 21 states have internal predecessors, (38), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 26 [2022-11-19 07:40:31,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:31,928 INFO L225 Difference]: With dead ends: 41 [2022-11-19 07:40:31,928 INFO L226 Difference]: Without dead ends: 39 [2022-11-19 07:40:31,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=297, Invalid=2153, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 07:40:31,930 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:31,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 90 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 261 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-11-19 07:40:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-19 07:40:31,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2022-11-19 07:40:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 07:40:31,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-11-19 07:40:31,941 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 26 [2022-11-19 07:40:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:31,941 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-11-19 07:40:31,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 21 states have internal predecessors, (38), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-19 07:40:31,942 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-11-19 07:40:31,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:40:31,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:31,948 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:31,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:32,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:32,155 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1882961244, now seen corresponding path program 3 times [2022-11-19 07:40:32,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:32,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732194180] [2022-11-19 07:40:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:32,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:40:32,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:32,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732194180] [2022-11-19 07:40:32,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732194180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:32,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248731983] [2022-11-19 07:40:32,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:40:32,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:32,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:32,627 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:32,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:40:32,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:40:32,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:40:32,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 07:40:32,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:32,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:40:32,986 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 23 treesize of output 22 [2022-11-19 07:40:33,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:40:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:40:33,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:33,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:40:33,228 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 31 treesize of output 27 [2022-11-19 07:40:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:40:33,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248731983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:40:33,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [478852242] [2022-11-19 07:40:33,357 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:40:33,357 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:33,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:33,357 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:33,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:33,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:33,424 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:40:33,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:40:33,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:33,472 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:40:33,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:40:33,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:33,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:40:34,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:34,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:34,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:34,080 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:40:34,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:40:34,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:40:34,251 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:40:34,252 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:40:35,358 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1326#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:40:35,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:40:35,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:40:35,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 24 [2022-11-19 07:40:35,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695088222] [2022-11-19 07:40:35,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:40:35,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:40:35,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:35,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:40:35,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:40:35,362 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 20 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-19 07:40:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:36,094 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2022-11-19 07:40:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-19 07:40:36,095 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 20 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 31 [2022-11-19 07:40:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:36,098 INFO L225 Difference]: With dead ends: 81 [2022-11-19 07:40:36,098 INFO L226 Difference]: Without dead ends: 79 [2022-11-19 07:40:36,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=442, Invalid=2750, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 07:40:36,101 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 250 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:36,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 126 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 266 Invalid, 0 Unknown, 20 Unchecked, 0.3s Time] [2022-11-19 07:40:36,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-19 07:40:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 42. [2022-11-19 07:40:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:40:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-11-19 07:40:36,114 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 31 [2022-11-19 07:40:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:36,115 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-11-19 07:40:36,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 20 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-19 07:40:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-11-19 07:40:36,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 07:40:36,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:36,117 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:36,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:36,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:36,323 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:36,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1379162595, now seen corresponding path program 3 times [2022-11-19 07:40:36,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:36,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589925264] [2022-11-19 07:40:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:36,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:40:36,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:36,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589925264] [2022-11-19 07:40:36,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589925264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:36,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966034715] [2022-11-19 07:40:36,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:40:36,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:36,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:36,891 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:36,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:40:36,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:40:36,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:40:36,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-19 07:40:36,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:37,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:40:37,254 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 [2022-11-19 07:40:37,370 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 31 treesize of output 30 [2022-11-19 07:40:37,467 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 23 treesize of output 22 [2022-11-19 07:40:37,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:40:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:40:37,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:39,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966034715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:39,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [734426915] [2022-11-19 07:40:39,234 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:40:39,234 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:39,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:39,234 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:39,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:39,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:39,325 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:40:39,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:40:39,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:39,371 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:40:39,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:40:39,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:39,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:40:39,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:39,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:39,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:40,002 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:40:40,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:40:40,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:40:40,164 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:40:40,165 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:40:41,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1711#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:40:41,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:40:41,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:40:41,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2022-11-19 07:40:41,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82865383] [2022-11-19 07:40:41,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:40:41,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:40:41,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:41,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:40:41,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1235, Unknown=1, NotChecked=0, Total=1406 [2022-11-19 07:40:41,251 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 24 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 10 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-19 07:40:41,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:41,632 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2022-11-19 07:40:41,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:40:41,632 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 10 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 33 [2022-11-19 07:40:41,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:41,633 INFO L225 Difference]: With dead ends: 69 [2022-11-19 07:40:41,633 INFO L226 Difference]: Without dead ends: 67 [2022-11-19 07:40:41,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=269, Invalid=1800, Unknown=1, NotChecked=0, Total=2070 [2022-11-19 07:40:41,635 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 95 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:41,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 161 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 256 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-19 07:40:41,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-19 07:40:41,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 42. [2022-11-19 07:40:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:40:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-11-19 07:40:41,647 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 33 [2022-11-19 07:40:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:41,648 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-11-19 07:40:41,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 10 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-19 07:40:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-11-19 07:40:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 07:40:41,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:41,649 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:41,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:41,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:41,863 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:41,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1409608667, now seen corresponding path program 4 times [2022-11-19 07:40:41,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:41,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752445690] [2022-11-19 07:40:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:41,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:40:42,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:42,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752445690] [2022-11-19 07:40:42,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752445690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:42,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706075331] [2022-11-19 07:40:42,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:40:42,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:42,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:42,002 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:42,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:40:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:42,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:40:42,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:40:42,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:40:42,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706075331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:40:42,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [605282913] [2022-11-19 07:40:42,209 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:40:42,209 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:42,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:42,210 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:42,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:42,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:42,274 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:40:42,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:40:42,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:42,326 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:40:42,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:40:42,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:42,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:40:42,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:42,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:42,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:42,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:42,949 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:40:42,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:40:43,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:40:43,161 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:40:43,162 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:40:44,000 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2103#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:40:44,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:40:44,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:40:44,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-11-19 07:40:44,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77861037] [2022-11-19 07:40:44,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:40:44,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:40:44,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:44,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:40:44,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:40:44,003 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-19 07:40:44,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:44,127 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2022-11-19 07:40:44,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:40:44,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 32 [2022-11-19 07:40:44,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:44,128 INFO L225 Difference]: With dead ends: 65 [2022-11-19 07:40:44,128 INFO L226 Difference]: Without dead ends: 52 [2022-11-19 07:40:44,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:40:44,129 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:44,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 66 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:40:44,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-19 07:40:44,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2022-11-19 07:40:44,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:40:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-11-19 07:40:44,140 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 32 [2022-11-19 07:40:44,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:44,141 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-11-19 07:40:44,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-19 07:40:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-11-19 07:40:44,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:40:44,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:44,142 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:44,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:44,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 07:40:44,348 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:44,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:44,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1274944484, now seen corresponding path program 5 times [2022-11-19 07:40:44,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:44,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040846740] [2022-11-19 07:40:44,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:44,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:40:44,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:44,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040846740] [2022-11-19 07:40:44,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040846740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:44,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272990598] [2022-11-19 07:40:44,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:40:44,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:44,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:44,949 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:44,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:40:45,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:40:45,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:40:45,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 07:40:45,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:45,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:40:45,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-19 07:40:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:40:45,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:45,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:40:45,540 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 24 treesize of output 20 [2022-11-19 07:40:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:40:45,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272990598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:40:45,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1472118706] [2022-11-19 07:40:45,797 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:40:45,798 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:45,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:45,798 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:45,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:45,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:45,871 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:40:45,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:40:45,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:45,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:40:46,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:46,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:40:46,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:46,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:46,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:46,484 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:40:46,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:40:46,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:40:46,682 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:40:46,683 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:40:47,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2502#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:40:47,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:40:47,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:40:47,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 34 [2022-11-19 07:40:47,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502076451] [2022-11-19 07:40:47,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:40:47,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 07:40:47,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:47,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 07:40:47,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1840, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:40:47,836 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 34 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 28 states have internal predecessors, (53), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-19 07:40:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:49,113 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2022-11-19 07:40:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 07:40:49,114 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 28 states have internal predecessors, (53), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 34 [2022-11-19 07:40:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:49,115 INFO L225 Difference]: With dead ends: 78 [2022-11-19 07:40:49,115 INFO L226 Difference]: Without dead ends: 76 [2022-11-19 07:40:49,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=606, Invalid=3950, Unknown=0, NotChecked=0, Total=4556 [2022-11-19 07:40:49,117 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 224 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:49,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 202 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:40:49,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-19 07:40:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 51. [2022-11-19 07:40:49,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:40:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-19 07:40:49,134 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 34 [2022-11-19 07:40:49,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:49,134 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-19 07:40:49,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 28 states have internal predecessors, (53), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-19 07:40:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-19 07:40:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 07:40:49,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:49,136 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:49,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:49,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:49,342 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:49,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:49,342 INFO L85 PathProgramCache]: Analyzing trace with hash 148186787, now seen corresponding path program 6 times [2022-11-19 07:40:49,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:49,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160000552] [2022-11-19 07:40:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:49,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:40:49,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:49,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160000552] [2022-11-19 07:40:49,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160000552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:49,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584771384] [2022-11-19 07:40:49,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:40:49,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:49,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:49,969 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:49,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:40:50,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:40:50,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:40:50,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-19 07:40:50,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:50,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:40:50,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:40:50,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:40:50,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:40:50,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-11-19 07:40:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:40:50,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:50,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584771384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:50,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1097425955] [2022-11-19 07:40:50,683 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:40:50,683 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:50,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:50,683 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:50,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:50,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:50,755 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:40:50,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:40:50,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:50,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:40:50,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:50,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:40:51,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:51,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:51,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:51,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:51,354 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:40:51,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:40:51,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:40:51,583 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:40:51,584 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:40:52,657 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2921#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:40:52,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:40:52,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:40:52,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2022-11-19 07:40:52,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722464374] [2022-11-19 07:40:52,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:40:52,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:40:52,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:52,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:40:52,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 07:40:52,661 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-19 07:40:53,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:53,477 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2022-11-19 07:40:53,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-19 07:40:53,478 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 39 [2022-11-19 07:40:53,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:53,480 INFO L225 Difference]: With dead ends: 85 [2022-11-19 07:40:53,480 INFO L226 Difference]: Without dead ends: 83 [2022-11-19 07:40:53,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=522, Invalid=3510, Unknown=0, NotChecked=0, Total=4032 [2022-11-19 07:40:53,483 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 211 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:53,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 146 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 344 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time] [2022-11-19 07:40:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-19 07:40:53,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2022-11-19 07:40:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:40:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-19 07:40:53,498 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 39 [2022-11-19 07:40:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:53,498 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-19 07:40:53,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-19 07:40:53,499 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-19 07:40:53,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:40:53,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:53,500 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:53,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:53,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:53,706 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:53,706 INFO L85 PathProgramCache]: Analyzing trace with hash 498837316, now seen corresponding path program 7 times [2022-11-19 07:40:53,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:53,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076772982] [2022-11-19 07:40:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:53,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:40:54,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:54,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076772982] [2022-11-19 07:40:54,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076772982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:54,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443618143] [2022-11-19 07:40:54,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:40:54,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:54,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:54,275 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:54,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:40:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:54,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-19 07:40:54,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:54,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:40:54,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:54,661 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 25 treesize of output 24 [2022-11-19 07:40:54,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:54,776 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 25 treesize of output 24 [2022-11-19 07:40:54,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:54,887 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 25 treesize of output 24 [2022-11-19 07:40:54,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:40:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:40:55,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:55,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 18 [2022-11-19 07:40:55,196 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 28 treesize of output 24 [2022-11-19 07:40:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:40:55,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443618143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:40:55,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710943250] [2022-11-19 07:40:55,334 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:40:55,334 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:55,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:55,335 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:55,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:55,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:55,408 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:40:55,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:40:55,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:55,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:40:55,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:55,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:40:56,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:56,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:56,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:56,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:56,025 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:40:56,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:40:56,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:40:56,256 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:40:56,257 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:40:57,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3441#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:40:57,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:40:57,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:40:57,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 13] total 28 [2022-11-19 07:40:57,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714597854] [2022-11-19 07:40:57,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:40:57,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 07:40:57,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:57,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 07:40:57,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:40:57,408 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-19 07:40:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:57,795 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2022-11-19 07:40:57,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:40:57,796 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 41 [2022-11-19 07:40:57,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:57,797 INFO L225 Difference]: With dead ends: 79 [2022-11-19 07:40:57,797 INFO L226 Difference]: Without dead ends: 77 [2022-11-19 07:40:57,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 87 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=278, Invalid=2074, Unknown=0, NotChecked=0, Total=2352 [2022-11-19 07:40:57,798 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 94 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:57,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 147 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 353 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-11-19 07:40:57,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-19 07:40:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2022-11-19 07:40:57,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:40:57,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2022-11-19 07:40:57,815 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 41 [2022-11-19 07:40:57,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:57,816 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2022-11-19 07:40:57,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-19 07:40:57,816 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2022-11-19 07:40:57,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 07:40:57,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:57,817 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:57,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:58,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:58,023 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:58,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:58,023 INFO L85 PathProgramCache]: Analyzing trace with hash -588297339, now seen corresponding path program 8 times [2022-11-19 07:40:58,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:58,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733120630] [2022-11-19 07:40:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:58,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:40:58,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:58,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733120630] [2022-11-19 07:40:58,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733120630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:58,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390772727] [2022-11-19 07:40:58,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:40:58,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:58,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:58,533 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:58,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:40:58,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:40:58,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:40:58,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-19 07:40:58,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:58,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:40:59,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-19 07:40:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:40:59,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:59,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:40:59,348 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 24 treesize of output 20 [2022-11-19 07:40:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:40:59,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390772727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:40:59,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [433785110] [2022-11-19 07:40:59,693 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:40:59,693 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:59,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:59,693 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:59,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:59,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:59,766 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:40:59,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:40:59,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:59,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:40:59,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:40:59,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:41:00,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:00,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:00,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:00,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:00,386 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:41:00,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:41:00,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:41:00,621 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:41:00,622 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:01,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3944#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:41:01,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:01,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:41:01,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-11-19 07:41:01,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511615518] [2022-11-19 07:41:01,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:01,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-19 07:41:01,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:01,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-19 07:41:01,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2022-11-19 07:41:01,752 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 37 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 32 states have internal predecessors, (67), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-19 07:41:03,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:03,286 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2022-11-19 07:41:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-19 07:41:03,288 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 32 states have internal predecessors, (67), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 42 [2022-11-19 07:41:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:03,289 INFO L225 Difference]: With dead ends: 103 [2022-11-19 07:41:03,289 INFO L226 Difference]: Without dead ends: 101 [2022-11-19 07:41:03,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2114 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=840, Invalid=6132, Unknown=0, NotChecked=0, Total=6972 [2022-11-19 07:41:03,292 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 199 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:03,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 271 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:41:03,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-19 07:41:03,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 59. [2022-11-19 07:41:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:41:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2022-11-19 07:41:03,331 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 42 [2022-11-19 07:41:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:03,331 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2022-11-19 07:41:03,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 32 states have internal predecessors, (67), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-19 07:41:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2022-11-19 07:41:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 07:41:03,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:03,340 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:03,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 07:41:03,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:41:03,545 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:03,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:03,546 INFO L85 PathProgramCache]: Analyzing trace with hash 281148228, now seen corresponding path program 9 times [2022-11-19 07:41:03,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:03,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712439573] [2022-11-19 07:41:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:03,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:41:04,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:04,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712439573] [2022-11-19 07:41:04,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712439573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:04,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270645401] [2022-11-19 07:41:04,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:41:04,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:04,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:04,259 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:04,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:41:04,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:41:04,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:41:04,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-19 07:41:04,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:04,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:41:04,678 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 [2022-11-19 07:41:04,814 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 23 treesize of output 22 [2022-11-19 07:41:04,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:41:04,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:41:04,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-11-19 07:41:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:41:04,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:05,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270645401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:05,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1461046374] [2022-11-19 07:41:05,144 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:41:05,144 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:05,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:05,145 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:05,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:05,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:05,218 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:41:05,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:41:05,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:05,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:41:05,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:05,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:41:05,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:05,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:05,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:05,792 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:41:05,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:41:05,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:41:05,978 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:41:05,980 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:07,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4452#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:41:07,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:07,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:41:07,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 27 [2022-11-19 07:41:07,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820453003] [2022-11-19 07:41:07,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:07,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 07:41:07,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:07,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 07:41:07,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 07:41:07,090 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 27 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 12 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-19 07:41:07,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:07,947 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2022-11-19 07:41:07,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 07:41:07,948 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 12 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 44 [2022-11-19 07:41:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:07,949 INFO L225 Difference]: With dead ends: 106 [2022-11-19 07:41:07,949 INFO L226 Difference]: Without dead ends: 104 [2022-11-19 07:41:07,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=502, Invalid=3658, Unknown=0, NotChecked=0, Total=4160 [2022-11-19 07:41:07,951 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 184 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:07,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 239 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 495 Invalid, 0 Unknown, 59 Unchecked, 0.3s Time] [2022-11-19 07:41:07,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-19 07:41:07,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 59. [2022-11-19 07:41:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:41:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2022-11-19 07:41:07,973 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 44 [2022-11-19 07:41:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:07,974 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2022-11-19 07:41:07,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 12 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-19 07:41:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2022-11-19 07:41:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:41:07,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:07,975 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:07,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:08,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:41:08,180 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:08,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:08,181 INFO L85 PathProgramCache]: Analyzing trace with hash 506144580, now seen corresponding path program 10 times [2022-11-19 07:41:08,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:08,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128068254] [2022-11-19 07:41:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:08,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:41:08,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:08,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128068254] [2022-11-19 07:41:08,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128068254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:08,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170930857] [2022-11-19 07:41:08,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:41:08,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:08,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:08,746 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:08,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:41:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:08,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-19 07:41:08,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:09,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:41:09,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:09,223 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 25 treesize of output 24 [2022-11-19 07:41:09,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:41:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:41:09,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:09,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:41:09,595 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 31 treesize of output 27 [2022-11-19 07:41:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:41:09,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170930857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:09,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [349373361] [2022-11-19 07:41:09,794 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:41:09,795 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:09,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:09,795 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:09,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:09,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:09,866 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:41:09,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:41:09,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:09,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:41:10,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:10,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:41:10,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:10,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:10,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:10,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:10,479 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:41:10,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:41:10,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:41:10,712 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:41:10,713 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:11,874 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5050#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:41:11,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:11,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:41:11,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 16] total 34 [2022-11-19 07:41:11,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310027758] [2022-11-19 07:41:11,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:11,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 07:41:11,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:11,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 07:41:11,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:41:11,877 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 34 states, 31 states have (on average 1.903225806451613) internal successors, (59), 29 states have internal predecessors, (59), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2022-11-19 07:41:12,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:12,890 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2022-11-19 07:41:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-19 07:41:12,891 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 1.903225806451613) internal successors, (59), 29 states have internal predecessors, (59), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 47 [2022-11-19 07:41:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:12,892 INFO L225 Difference]: With dead ends: 102 [2022-11-19 07:41:12,892 INFO L226 Difference]: Without dead ends: 100 [2022-11-19 07:41:12,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=489, Invalid=4341, Unknown=0, NotChecked=0, Total=4830 [2022-11-19 07:41:12,895 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 153 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:12,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 387 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 839 Invalid, 0 Unknown, 27 Unchecked, 0.5s Time] [2022-11-19 07:41:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-19 07:41:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 59. [2022-11-19 07:41:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:41:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2022-11-19 07:41:12,927 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 47 [2022-11-19 07:41:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:12,928 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2022-11-19 07:41:12,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 1.903225806451613) internal successors, (59), 29 states have internal predecessors, (59), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2022-11-19 07:41:12,929 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2022-11-19 07:41:12,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:41:12,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:12,931 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:12,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:13,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:13,137 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash 957557732, now seen corresponding path program 11 times [2022-11-19 07:41:13,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:13,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674297697] [2022-11-19 07:41:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:13,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:41:13,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:13,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674297697] [2022-11-19 07:41:13,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674297697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:13,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910610210] [2022-11-19 07:41:13,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:41:13,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:13,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:13,340 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:13,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:41:13,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-19 07:41:13,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:41:13,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:41:13,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:41:13,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:41:13,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910610210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:13,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1613617952] [2022-11-19 07:41:13,803 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:41:13,803 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:13,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:13,804 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:13,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:13,873 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:41:13,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:41:13,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:13,910 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:41:13,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:41:14,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:14,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:41:14,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:14,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:14,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:14,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:14,485 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:41:14,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:41:14,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:41:14,711 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:41:14,712 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:15,699 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5637#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:41:15,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:15,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:41:15,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2022-11-19 07:41:15,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509274538] [2022-11-19 07:41:15,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:15,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 07:41:15,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:15,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 07:41:15,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:41:15,701 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-19 07:41:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:16,170 INFO L93 Difference]: Finished difference Result 150 states and 160 transitions. [2022-11-19 07:41:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-19 07:41:16,170 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 46 [2022-11-19 07:41:16,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:16,171 INFO L225 Difference]: With dead ends: 150 [2022-11-19 07:41:16,171 INFO L226 Difference]: Without dead ends: 108 [2022-11-19 07:41:16,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=578, Invalid=3082, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 07:41:16,173 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 161 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:16,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 100 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:41:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-19 07:41:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2022-11-19 07:41:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:41:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2022-11-19 07:41:16,199 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 46 [2022-11-19 07:41:16,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:16,200 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2022-11-19 07:41:16,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-19 07:41:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2022-11-19 07:41:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 07:41:16,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:16,201 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:16,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:16,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:41:16,417 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:16,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:16,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1071482044, now seen corresponding path program 12 times [2022-11-19 07:41:16,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:16,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980141251] [2022-11-19 07:41:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:16,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:41:16,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:16,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980141251] [2022-11-19 07:41:16,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980141251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:16,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979670908] [2022-11-19 07:41:16,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:41:16,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:16,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:16,895 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:16,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:41:16,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:41:16,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:41:16,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-19 07:41:17,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:17,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:41:17,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:41:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 9 proven. 64 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:41:17,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:17,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:41:17,670 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 24 treesize of output 20 [2022-11-19 07:41:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:41:17,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979670908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:17,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [133615470] [2022-11-19 07:41:17,843 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:41:17,843 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:17,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:17,844 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:17,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:17,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:17,919 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:41:17,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:41:17,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:17,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:41:18,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:18,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:41:18,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:18,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:18,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:18,433 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:41:18,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:41:18,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:41:18,573 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:41:18,574 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:19,717 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6343#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:41:19,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:19,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:41:19,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 33 [2022-11-19 07:41:19,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184941475] [2022-11-19 07:41:19,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:19,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 07:41:19,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:19,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 07:41:19,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1795, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 07:41:19,720 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 33 states, 31 states have (on average 2.0) internal successors, (62), 29 states have internal predecessors, (62), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-19 07:41:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:20,540 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2022-11-19 07:41:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 07:41:20,541 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 29 states have internal predecessors, (62), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 50 [2022-11-19 07:41:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:20,542 INFO L225 Difference]: With dead ends: 92 [2022-11-19 07:41:20,542 INFO L226 Difference]: Without dead ends: 76 [2022-11-19 07:41:20,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 119 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=389, Invalid=3393, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 07:41:20,543 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 138 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:20,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 269 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:41:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-19 07:41:20,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2022-11-19 07:41:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:41:20,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-11-19 07:41:20,571 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 50 [2022-11-19 07:41:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:20,572 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-11-19 07:41:20,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 29 states have internal predecessors, (62), 12 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-19 07:41:20,572 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-11-19 07:41:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:41:20,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:20,573 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:20,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:20,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:41:20,773 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:20,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1067309053, now seen corresponding path program 13 times [2022-11-19 07:41:20,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:20,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488498285] [2022-11-19 07:41:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:20,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 6 proven. 83 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-19 07:41:21,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:21,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488498285] [2022-11-19 07:41:21,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488498285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:21,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692528056] [2022-11-19 07:41:21,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:41:21,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:21,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:21,436 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:21,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:41:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:21,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 07:41:21,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:21,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:41:22,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:22,012 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 25 treesize of output 24 [2022-11-19 07:41:22,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:41:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 18 proven. 83 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:41:22,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:22,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:41:22,397 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 31 treesize of output 27 [2022-11-19 07:41:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 6 proven. 83 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-19 07:41:22,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692528056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:22,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1663625523] [2022-11-19 07:41:22,569 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:41:22,569 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:22,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:22,570 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:22,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:22,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:22,642 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:41:22,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:41:22,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:22,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:41:22,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:22,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:41:23,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:23,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:23,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:23,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:23,214 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:41:23,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:41:23,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:41:23,421 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:41:23,423 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:24,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6983#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:41:24,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:24,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:41:24,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 18] total 36 [2022-11-19 07:41:24,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564090916] [2022-11-19 07:41:24,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:24,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:41:24,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:24,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:41:24,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 07:41:24,649 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-19 07:41:25,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:25,301 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2022-11-19 07:41:25,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:41:25,301 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) Word has length 55 [2022-11-19 07:41:25,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:25,302 INFO L225 Difference]: With dead ends: 100 [2022-11-19 07:41:25,302 INFO L226 Difference]: Without dead ends: 98 [2022-11-19 07:41:25,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 134 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=335, Invalid=3205, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 07:41:25,304 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 161 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:25,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 201 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 639 Invalid, 0 Unknown, 31 Unchecked, 0.4s Time] [2022-11-19 07:41:25,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-19 07:41:25,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2022-11-19 07:41:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 07:41:25,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2022-11-19 07:41:25,330 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 55 [2022-11-19 07:41:25,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:25,331 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2022-11-19 07:41:25,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-19 07:41:25,331 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2022-11-19 07:41:25,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 07:41:25,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:25,332 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:25,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:25,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:25,532 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:25,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:25,533 INFO L85 PathProgramCache]: Analyzing trace with hash -555594203, now seen corresponding path program 14 times [2022-11-19 07:41:25,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:25,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100315153] [2022-11-19 07:41:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:25,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 7 proven. 96 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-19 07:41:26,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:26,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100315153] [2022-11-19 07:41:26,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100315153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:26,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63795296] [2022-11-19 07:41:26,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:41:26,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:26,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:26,159 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:26,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:41:26,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-19 07:41:26,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:41:26,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 07:41:26,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:26,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 07:41:27,163 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-19 07:41:27,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-19 07:41:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 42 proven. 61 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-19 07:41:27,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:27,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 18 [2022-11-19 07:41:27,733 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 34 treesize of output 28 [2022-11-19 07:41:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 37 proven. 66 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-19 07:41:28,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63795296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:28,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [970638669] [2022-11-19 07:41:28,227 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:41:28,227 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:28,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:28,228 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:28,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:28,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:28,287 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:41:28,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:41:28,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:28,328 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:41:28,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:41:28,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:28,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:41:28,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:28,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:28,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:28,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:28,851 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:41:28,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:41:28,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:41:29,046 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:41:29,048 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:30,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7673#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:41:30,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:30,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:41:30,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 49 [2022-11-19 07:41:30,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204071259] [2022-11-19 07:41:30,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:30,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 07:41:30,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:30,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 07:41:30,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=3318, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 07:41:30,362 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 49 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 44 states have internal predecessors, (97), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2022-11-19 07:41:31,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:31,752 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2022-11-19 07:41:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-19 07:41:31,752 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 44 states have internal predecessors, (97), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) Word has length 58 [2022-11-19 07:41:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:31,753 INFO L225 Difference]: With dead ends: 80 [2022-11-19 07:41:31,753 INFO L226 Difference]: Without dead ends: 61 [2022-11-19 07:41:31,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=698, Invalid=6612, Unknown=0, NotChecked=0, Total=7310 [2022-11-19 07:41:31,755 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:31,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 276 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 327 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-11-19 07:41:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-19 07:41:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-19 07:41:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 07:41:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-11-19 07:41:31,773 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 58 [2022-11-19 07:41:31,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:31,773 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-11-19 07:41:31,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 44 states have internal predecessors, (97), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2022-11-19 07:41:31,773 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-11-19 07:41:31,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:41:31,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:31,774 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:31,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:31,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:41:31,975 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:31,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:31,975 INFO L85 PathProgramCache]: Analyzing trace with hash -909849628, now seen corresponding path program 15 times [2022-11-19 07:41:31,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:31,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100904486] [2022-11-19 07:41:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:31,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 7 proven. 117 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 07:41:32,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:32,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100904486] [2022-11-19 07:41:32,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100904486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:32,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192381358] [2022-11-19 07:41:32,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:41:32,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:32,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:32,739 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:32,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:41:32,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:41:32,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:41:32,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-19 07:41:32,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:33,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:41:33,480 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 23 treesize of output 22 [2022-11-19 07:41:33,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:41:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-19 07:41:33,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:33,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:41:33,952 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 31 treesize of output 27 [2022-11-19 07:41:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 7 proven. 117 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 07:41:34,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192381358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:34,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942172391] [2022-11-19 07:41:34,183 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:41:34,183 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:34,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:34,184 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:34,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:34,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:34,249 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:41:34,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:41:34,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:34,288 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:41:34,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:41:34,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:34,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:41:34,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:34,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:34,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:34,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:34,850 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:41:34,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:41:34,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:41:35,048 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:41:35,049 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:36,368 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8363#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:41:36,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:36,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:41:36,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 20] total 42 [2022-11-19 07:41:36,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700946871] [2022-11-19 07:41:36,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:36,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 07:41:36,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:36,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 07:41:36,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2626, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 07:41:36,370 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 42 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) [2022-11-19 07:41:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:37,412 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2022-11-19 07:41:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-19 07:41:37,413 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) Word has length 63 [2022-11-19 07:41:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:37,414 INFO L225 Difference]: With dead ends: 116 [2022-11-19 07:41:37,414 INFO L226 Difference]: Without dead ends: 114 [2022-11-19 07:41:37,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=411, Invalid=4281, Unknown=0, NotChecked=0, Total=4692 [2022-11-19 07:41:37,416 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:37,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 445 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1146 Invalid, 0 Unknown, 32 Unchecked, 0.7s Time] [2022-11-19 07:41:37,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-19 07:41:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 83. [2022-11-19 07:41:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.078125) internal successors, (69), 64 states have internal predecessors, (69), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:41:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-11-19 07:41:37,450 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 63 [2022-11-19 07:41:37,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:37,450 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-11-19 07:41:37,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 17 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) [2022-11-19 07:41:37,451 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-11-19 07:41:37,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 07:41:37,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:37,452 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 8, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:37,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:37,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:37,654 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:37,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1825200989, now seen corresponding path program 16 times [2022-11-19 07:41:37,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:37,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603892167] [2022-11-19 07:41:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:37,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 9 proven. 125 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-19 07:41:38,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:38,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603892167] [2022-11-19 07:41:38,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603892167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:38,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448381956] [2022-11-19 07:41:38,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:41:38,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:38,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:38,588 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:38,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:41:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:38,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-19 07:41:38,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:39,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:41:39,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:39,151 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 25 treesize of output 24 [2022-11-19 07:41:39,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:39,273 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 25 treesize of output 24 [2022-11-19 07:41:39,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:39,392 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 25 treesize of output 24 [2022-11-19 07:41:39,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:41:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 51 proven. 119 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-19 07:41:39,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:39,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448381956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:39,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263795597] [2022-11-19 07:41:39,933 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:41:39,933 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:39,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:39,933 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:39,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:39,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:40,010 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:41:40,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:41:40,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:40,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:41:40,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:40,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:41:40,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:40,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:40,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:40,559 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:41:40,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:41:40,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:41:40,711 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:41:40,712 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:41,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8983#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:41:41,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:41,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:41:41,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 40 [2022-11-19 07:41:41,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439537912] [2022-11-19 07:41:41,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:41,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-19 07:41:41,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:41,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-19 07:41:41,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2710, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 07:41:41,954 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 40 states, 38 states have (on average 1.868421052631579) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2022-11-19 07:41:43,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:43,217 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-11-19 07:41:43,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-19 07:41:43,217 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.868421052631579) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) Word has length 65 [2022-11-19 07:41:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:43,218 INFO L225 Difference]: With dead ends: 112 [2022-11-19 07:41:43,218 INFO L226 Difference]: Without dead ends: 110 [2022-11-19 07:41:43,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 109 SyntacticMatches, 9 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=567, Invalid=4983, Unknown=0, NotChecked=0, Total=5550 [2022-11-19 07:41:43,220 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 118 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:43,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 353 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 895 Invalid, 0 Unknown, 39 Unchecked, 0.5s Time] [2022-11-19 07:41:43,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-19 07:41:43,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 71. [2022-11-19 07:41:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:41:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-11-19 07:41:43,252 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 65 [2022-11-19 07:41:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:43,253 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-11-19 07:41:43,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.868421052631579) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2022-11-19 07:41:43,253 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-11-19 07:41:43,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 07:41:43,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:43,254 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:43,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:43,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:43,460 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:43,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:43,460 INFO L85 PathProgramCache]: Analyzing trace with hash 213848740, now seen corresponding path program 17 times [2022-11-19 07:41:43,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:43,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415041562] [2022-11-19 07:41:43,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:43,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 8 proven. 133 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 07:41:44,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:44,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415041562] [2022-11-19 07:41:44,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415041562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:44,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509634345] [2022-11-19 07:41:44,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:41:44,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:44,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:44,202 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:44,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 07:41:44,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-19 07:41:44,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:41:44,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-19 07:41:44,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:44,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:41:45,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-19 07:41:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 8 proven. 133 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 07:41:45,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:45,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:41:45,761 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 24 treesize of output 20 [2022-11-19 07:41:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 8 proven. 133 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 07:41:46,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509634345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:46,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759534879] [2022-11-19 07:41:46,292 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:41:46,292 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:46,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:46,292 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:46,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:46,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:46,358 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:41:46,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:41:46,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:46,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:41:46,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:46,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:41:46,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:46,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:46,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:46,881 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:41:46,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:41:46,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:41:47,027 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:41:47,028 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:48,425 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9752#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:41:48,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:48,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:41:48,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 57 [2022-11-19 07:41:48,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846999341] [2022-11-19 07:41:48,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:48,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-19 07:41:48,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:48,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-19 07:41:48,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=4242, Unknown=0, NotChecked=0, Total=4692 [2022-11-19 07:41:48,428 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 52 states have internal predecessors, (112), 22 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) [2022-11-19 07:41:51,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:51,252 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2022-11-19 07:41:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-19 07:41:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.0) internal successors, (112), 52 states have internal predecessors, (112), 22 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) Word has length 66 [2022-11-19 07:41:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:51,253 INFO L225 Difference]: With dead ends: 146 [2022-11-19 07:41:51,253 INFO L226 Difference]: Without dead ends: 144 [2022-11-19 07:41:51,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4114 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1407, Invalid=11703, Unknown=0, NotChecked=0, Total=13110 [2022-11-19 07:41:51,256 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 324 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:51,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 385 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:41:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-19 07:41:51,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 95. [2022-11-19 07:41:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:41:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2022-11-19 07:41:51,313 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 66 [2022-11-19 07:41:51,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:51,313 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2022-11-19 07:41:51,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.0) internal successors, (112), 52 states have internal predecessors, (112), 22 states have call successors, (23), 1 states have call predecessors, (23), 2 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) [2022-11-19 07:41:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2022-11-19 07:41:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 07:41:51,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:51,315 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:51,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-19 07:41:51,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:51,521 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:51,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:51,522 INFO L85 PathProgramCache]: Analyzing trace with hash -18652829, now seen corresponding path program 18 times [2022-11-19 07:41:51,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:51,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887209435] [2022-11-19 07:41:51,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:51,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 8 proven. 157 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-19 07:41:52,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887209435] [2022-11-19 07:41:52,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887209435] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164976285] [2022-11-19 07:41:52,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:41:52,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:52,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:52,349 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:52,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 07:41:52,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:41:52,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:41:52,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 07:41:52,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:52,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:41:53,123 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 23 treesize of output 22 [2022-11-19 07:41:53,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:41:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 24 proven. 157 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 07:41:53,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:53,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:41:53,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-11-19 07:41:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 8 proven. 157 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-19 07:41:53,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164976285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:53,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [351128194] [2022-11-19 07:41:53,971 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:41:53,971 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:53,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:53,972 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:53,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:54,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:54,049 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:41:54,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:41:54,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:54,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:41:54,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:54,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:41:54,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:54,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:54,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:54,557 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:41:54,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:41:54,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:41:54,708 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:41:54,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:56,112 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10666#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:41:56,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:56,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:41:56,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 23] total 46 [2022-11-19 07:41:56,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150286264] [2022-11-19 07:41:56,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:56,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-19 07:41:56,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:56,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-19 07:41:56,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=3045, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 07:41:56,114 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2022-11-19 07:41:58,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:58,352 INFO L93 Difference]: Finished difference Result 178 states and 186 transitions. [2022-11-19 07:41:58,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-19 07:41:58,355 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) Word has length 71 [2022-11-19 07:41:58,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:58,356 INFO L225 Difference]: With dead ends: 178 [2022-11-19 07:41:58,356 INFO L226 Difference]: Without dead ends: 176 [2022-11-19 07:41:58,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 175 SyntacticMatches, 6 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3431 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1008, Invalid=9704, Unknown=0, NotChecked=0, Total=10712 [2022-11-19 07:41:58,358 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 337 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:58,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 593 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1392 Invalid, 0 Unknown, 38 Unchecked, 0.9s Time] [2022-11-19 07:41:58,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-19 07:41:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 117. [2022-11-19 07:41:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 95 states have (on average 1.063157894736842) internal successors, (101), 95 states have internal predecessors, (101), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 07:41:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2022-11-19 07:41:58,431 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 71 [2022-11-19 07:41:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:58,431 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2022-11-19 07:41:58,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 18 states have call successors, (19) [2022-11-19 07:41:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2022-11-19 07:41:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:41:58,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:58,433 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 9, 9, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:58,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:58,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:58,639 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:58,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:58,640 INFO L85 PathProgramCache]: Analyzing trace with hash -366892924, now seen corresponding path program 19 times [2022-11-19 07:41:58,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:58,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203093437] [2022-11-19 07:41:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:58,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 10 proven. 165 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-19 07:41:59,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:59,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203093437] [2022-11-19 07:41:59,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203093437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:59,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876872256] [2022-11-19 07:41:59,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:41:59,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:59,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:59,563 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:59,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 07:41:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:59,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-19 07:41:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:42:00,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:42:00,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,206 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 25 treesize of output 24 [2022-11-19 07:42:00,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,332 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 25 treesize of output 24 [2022-11-19 07:42:00,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:00,459 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 25 treesize of output 24 [2022-11-19 07:42:00,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:42:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 58 proven. 159 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-19 07:42:00,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:42:01,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 18 [2022-11-19 07:42:01,104 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 28 treesize of output 24 [2022-11-19 07:42:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 7 proven. 165 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-19 07:42:01,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876872256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:42:01,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [507390521] [2022-11-19 07:42:01,292 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:42:01,292 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:42:01,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:42:01,293 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:42:01,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:42:01,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:01,358 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:42:01,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:42:01,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:01,396 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:42:01,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:42:01,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:01,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:42:01,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:01,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:01,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:01,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:01,939 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:42:01,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:42:02,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:42:02,137 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:42:02,138 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:42:03,437 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11669#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:42:03,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:42:03,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:42:03,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 22] total 46 [2022-11-19 07:42:03,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051588177] [2022-11-19 07:42:03,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:42:03,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-19 07:42:03,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:42:03,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-19 07:42:03,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=3033, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 07:42:03,440 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2022-11-19 07:42:04,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:42:04,611 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2022-11-19 07:42:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-19 07:42:04,612 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) Word has length 73 [2022-11-19 07:42:04,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:42:04,613 INFO L225 Difference]: With dead ends: 167 [2022-11-19 07:42:04,613 INFO L226 Difference]: Without dead ends: 165 [2022-11-19 07:42:04,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 173 SyntacticMatches, 12 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=474, Invalid=5226, Unknown=0, NotChecked=0, Total=5700 [2022-11-19 07:42:04,614 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 159 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:42:04,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 440 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1173 Invalid, 0 Unknown, 53 Unchecked, 0.7s Time] [2022-11-19 07:42:04,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-19 07:42:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 100. [2022-11-19 07:42:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.064102564102564) internal successors, (83), 78 states have internal predecessors, (83), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 07:42:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2022-11-19 07:42:04,673 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 73 [2022-11-19 07:42:04,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:42:04,673 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2022-11-19 07:42:04,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 20 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 21 states have call predecessors, (21), 20 states have call successors, (21) [2022-11-19 07:42:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2022-11-19 07:42:04,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:42:04,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:42:04,675 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:42:04,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 07:42:04,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 07:42:04,881 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:42:04,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:42:04,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1630136123, now seen corresponding path program 20 times [2022-11-19 07:42:04,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:42:04,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66684652] [2022-11-19 07:42:04,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:42:04,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:42:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 9 proven. 176 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-19 07:42:05,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:42:05,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66684652] [2022-11-19 07:42:05,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66684652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:42:05,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46538423] [2022-11-19 07:42:05,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:42:05,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:42:05,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:42:05,805 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:42:05,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 07:42:06,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-19 07:42:06,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:42:06,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-19 07:42:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:42:06,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:42:07,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-19 07:42:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 9 proven. 176 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-19 07:42:07,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:42:07,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:42:07,518 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 24 treesize of output 20 [2022-11-19 07:42:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 9 proven. 176 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-19 07:42:08,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46538423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:42:08,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [164835369] [2022-11-19 07:42:08,120 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:42:08,120 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:42:08,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:42:08,121 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:42:08,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:42:08,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,190 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:42:08,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:42:08,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,231 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:42:08,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:42:08,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:42:08,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:08,757 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:42:08,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:42:08,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:42:08,951 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:42:08,952 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:42:10,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12600#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:42:10,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:42:10,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:42:10,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 62 [2022-11-19 07:42:10,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042850589] [2022-11-19 07:42:10,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:42:10,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-19 07:42:10,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:42:10,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-19 07:42:10,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=4907, Unknown=0, NotChecked=0, Total=5402 [2022-11-19 07:42:10,402 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 62 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 57 states have internal predecessors, (127), 25 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2022-11-19 07:42:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:42:14,476 INFO L93 Difference]: Finished difference Result 204 states and 219 transitions. [2022-11-19 07:42:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-19 07:42:14,477 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 57 states have internal predecessors, (127), 25 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) Word has length 74 [2022-11-19 07:42:14,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:42:14,478 INFO L225 Difference]: With dead ends: 204 [2022-11-19 07:42:14,478 INFO L226 Difference]: Without dead ends: 202 [2022-11-19 07:42:14,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5819 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1776, Invalid=16856, Unknown=0, NotChecked=0, Total=18632 [2022-11-19 07:42:14,481 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 282 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:42:14,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 702 Invalid, 1967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 07:42:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-19 07:42:14,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 106. [2022-11-19 07:42:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 states have internal predecessors, (89), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 07:42:14,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2022-11-19 07:42:14,531 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 74 [2022-11-19 07:42:14,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:42:14,532 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2022-11-19 07:42:14,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 57 states have internal predecessors, (127), 25 states have call successors, (26), 1 states have call predecessors, (26), 2 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2022-11-19 07:42:14,532 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2022-11-19 07:42:14,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-19 07:42:14,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:42:14,533 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:42:14,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 07:42:14,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 07:42:14,739 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:42:14,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:42:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1512359804, now seen corresponding path program 21 times [2022-11-19 07:42:14,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:42:14,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806379989] [2022-11-19 07:42:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:42:14,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:42:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 9 proven. 203 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-19 07:42:15,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:42:15,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806379989] [2022-11-19 07:42:15,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806379989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:42:15,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583631503] [2022-11-19 07:42:15,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:42:15,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:42:15,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:42:15,719 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:42:15,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 07:42:15,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:42:15,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:42:15,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-19 07:42:15,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:42:16,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:42:16,552 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 23 treesize of output 22 [2022-11-19 07:42:17,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:42:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 27 proven. 203 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-19 07:42:17,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:42:17,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:42:17,287 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 31 treesize of output 27 [2022-11-19 07:42:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 9 proven. 203 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-19 07:42:17,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583631503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:42:17,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370640332] [2022-11-19 07:42:17,532 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:42:17,532 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:42:17,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:42:17,533 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:42:17,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:42:17,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:17,600 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:42:17,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:42:17,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:17,638 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:42:17,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:42:17,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:17,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:42:18,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:18,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:18,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:18,110 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:42:18,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:42:18,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:42:18,270 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:42:18,274 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:42:19,669 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13697#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:42:19,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:42:19,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:42:19,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 25] total 52 [2022-11-19 07:42:19,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374344226] [2022-11-19 07:42:19,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:42:19,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-19 07:42:19,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:42:19,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-19 07:42:19,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=3743, Unknown=0, NotChecked=0, Total=4032 [2022-11-19 07:42:19,671 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand has 52 states, 49 states have (on average 2.061224489795918) internal successors, (101), 47 states have internal predecessors, (101), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-19 07:42:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:42:22,601 INFO L93 Difference]: Finished difference Result 244 states and 253 transitions. [2022-11-19 07:42:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-19 07:42:22,601 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 2.061224489795918) internal successors, (101), 47 states have internal predecessors, (101), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) Word has length 79 [2022-11-19 07:42:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:42:22,603 INFO L225 Difference]: With dead ends: 244 [2022-11-19 07:42:22,603 INFO L226 Difference]: Without dead ends: 242 [2022-11-19 07:42:22,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 196 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1218, Invalid=13788, Unknown=0, NotChecked=0, Total=15006 [2022-11-19 07:42:22,605 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 424 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 2105 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 2273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:42:22,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 855 Invalid, 2273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2105 Invalid, 0 Unknown, 86 Unchecked, 1.1s Time] [2022-11-19 07:42:22,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-19 07:42:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 131. [2022-11-19 07:42:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 107 states have (on average 1.0654205607476634) internal successors, (114), 107 states have internal predecessors, (114), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 07:42:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 140 transitions. [2022-11-19 07:42:22,689 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 140 transitions. Word has length 79 [2022-11-19 07:42:22,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:42:22,689 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 140 transitions. [2022-11-19 07:42:22,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 2.061224489795918) internal successors, (101), 47 states have internal predecessors, (101), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-19 07:42:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 140 transitions. [2022-11-19 07:42:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 07:42:22,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:42:22,691 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 10, 10, 10, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:42:22,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-19 07:42:22,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:42:22,897 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:42:22,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:42:22,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2104073731, now seen corresponding path program 22 times [2022-11-19 07:42:22,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:42:22,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251155890] [2022-11-19 07:42:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:42:22,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:42:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 11 proven. 211 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-19 07:42:23,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:42:23,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251155890] [2022-11-19 07:42:23,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251155890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:42:23,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810771213] [2022-11-19 07:42:23,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:42:23,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:42:23,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:42:23,999 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:42:24,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 07:42:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:24,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-19 07:42:24,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:42:24,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:42:24,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:24,723 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 25 treesize of output 24 [2022-11-19 07:42:24,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:24,857 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 25 treesize of output 24 [2022-11-19 07:42:24,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:24,988 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 25 treesize of output 24 [2022-11-19 07:42:25,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:42:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 66 proven. 208 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 07:42:25,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:42:25,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 18 [2022-11-19 07:42:25,626 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 28 treesize of output 24 [2022-11-19 07:42:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 8 proven. 211 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-19 07:42:25,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810771213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:42:25,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1336592337] [2022-11-19 07:42:25,867 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:42:25,867 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:42:25,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:42:25,868 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:42:25,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:42:25,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:25,932 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:42:25,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:42:25,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:25,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:42:26,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:26,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:42:26,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:26,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:26,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:26,409 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:42:26,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:42:26,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:42:26,560 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:42:26,561 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:42:27,896 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14884#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:42:27,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:42:27,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:42:27,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 23] total 48 [2022-11-19 07:42:27,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543846066] [2022-11-19 07:42:27,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:42:27,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-19 07:42:27,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:42:27,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-19 07:42:27,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=3263, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 07:42:27,899 INFO L87 Difference]: Start difference. First operand 131 states and 140 transitions. Second operand has 48 states, 46 states have (on average 2.108695652173913) internal successors, (97), 44 states have internal predecessors, (97), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2022-11-19 07:42:29,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:42:29,646 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2022-11-19 07:42:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-19 07:42:29,647 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.108695652173913) internal successors, (97), 44 states have internal predecessors, (97), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) Word has length 81 [2022-11-19 07:42:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:42:29,648 INFO L225 Difference]: With dead ends: 233 [2022-11-19 07:42:29,648 INFO L226 Difference]: Without dead ends: 231 [2022-11-19 07:42:29,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 197 SyntacticMatches, 12 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2830 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=733, Invalid=8009, Unknown=0, NotChecked=0, Total=8742 [2022-11-19 07:42:29,649 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 238 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:42:29,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 689 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1552 Invalid, 0 Unknown, 31 Unchecked, 0.8s Time] [2022-11-19 07:42:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-19 07:42:29,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 111. [2022-11-19 07:42:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 87 states have internal predecessors, (93), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 07:42:29,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2022-11-19 07:42:29,707 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 81 [2022-11-19 07:42:29,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:42:29,708 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2022-11-19 07:42:29,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.108695652173913) internal successors, (97), 44 states have internal predecessors, (97), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2022-11-19 07:42:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2022-11-19 07:42:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 07:42:29,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:42:29,709 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:42:29,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-19 07:42:29,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 07:42:29,914 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:42:29,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:42:29,915 INFO L85 PathProgramCache]: Analyzing trace with hash -498474492, now seen corresponding path program 23 times [2022-11-19 07:42:29,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:42:29,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072112687] [2022-11-19 07:42:29,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:42:29,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:42:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 10 proven. 225 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-19 07:42:30,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:42:30,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072112687] [2022-11-19 07:42:30,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072112687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:42:30,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786394948] [2022-11-19 07:42:30,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:42:30,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:42:30,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:42:30,801 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:42:30,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 07:42:31,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-19 07:42:31,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:42:31,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-19 07:42:31,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:42:31,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:42:32,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-19 07:42:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 225 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-19 07:42:32,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:42:32,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:42:32,794 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 24 treesize of output 20 [2022-11-19 07:42:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 10 proven. 225 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-19 07:42:33,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786394948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:42:33,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1220745252] [2022-11-19 07:42:33,463 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:42:33,463 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:42:33,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:42:33,464 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:42:33,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:42:33,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:33,527 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:42:33,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:42:33,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:33,563 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:42:33,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:42:33,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:33,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:42:34,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:34,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:34,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:34,053 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:42:34,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:42:34,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:42:34,212 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:42:34,213 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:42:35,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16005#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:42:35,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:42:35,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:42:35,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 67 [2022-11-19 07:42:35,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744341662] [2022-11-19 07:42:35,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:42:35,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-19 07:42:35,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:42:35,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-19 07:42:35,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=5600, Unknown=0, NotChecked=0, Total=6162 [2022-11-19 07:42:35,712 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 67 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 62 states have internal predecessors, (142), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2022-11-19 07:42:41,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:42:41,509 INFO L93 Difference]: Finished difference Result 257 states and 274 transitions. [2022-11-19 07:42:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-19 07:42:41,510 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 62 states have internal predecessors, (142), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) Word has length 82 [2022-11-19 07:42:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:42:41,511 INFO L225 Difference]: With dead ends: 257 [2022-11-19 07:42:41,511 INFO L226 Difference]: Without dead ends: 255 [2022-11-19 07:42:41,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8813 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2366, Invalid=25024, Unknown=0, NotChecked=0, Total=27390 [2022-11-19 07:42:41,514 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 344 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:42:41,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 981 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2686 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-19 07:42:41,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-19 07:42:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 117. [2022-11-19 07:42:41,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 93 states have (on average 1.064516129032258) internal successors, (99), 93 states have internal predecessors, (99), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 07:42:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2022-11-19 07:42:41,603 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 82 [2022-11-19 07:42:41,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:42:41,603 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2022-11-19 07:42:41,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 62 states have internal predecessors, (142), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2022-11-19 07:42:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2022-11-19 07:42:41,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:42:41,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:42:41,605 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 10, 10, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:42:41,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-19 07:42:41,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 07:42:41,810 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:42:41,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:42:41,811 INFO L85 PathProgramCache]: Analyzing trace with hash -53554493, now seen corresponding path program 24 times [2022-11-19 07:42:41,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:42:41,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284117851] [2022-11-19 07:42:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:42:41,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:42:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 10 proven. 255 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-19 07:42:42,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:42:42,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284117851] [2022-11-19 07:42:42,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284117851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:42:42,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630836394] [2022-11-19 07:42:42,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:42:42,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:42:42,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:42:42,845 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:42:42,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-19 07:42:43,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:42:43,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:42:43,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-19 07:42:43,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:42:43,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:42:43,842 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 23 treesize of output 22 [2022-11-19 07:42:44,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:42:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 31 proven. 260 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-19 07:42:44,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:42:44,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:42:44,546 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 31 treesize of output 27 [2022-11-19 07:42:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 10 proven. 255 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-19 07:42:44,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630836394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:42:44,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [526002826] [2022-11-19 07:42:44,785 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:42:44,785 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:42:44,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:42:44,785 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:42:44,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:42:44,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:44,846 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:42:44,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:42:44,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:44,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:42:44,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:44,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:42:45,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:45,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:45,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:45,325 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:42:45,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:42:45,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:42:45,469 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:42:45,471 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:42:46,887 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17286#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:42:46,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:42:46,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:42:46,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 26] total 52 [2022-11-19 07:42:46,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748134991] [2022-11-19 07:42:46,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:42:46,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-19 07:42:46,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:42:46,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-19 07:42:46,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=3748, Unknown=0, NotChecked=0, Total=4032 [2022-11-19 07:42:46,891 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand has 52 states, 50 states have (on average 2.14) internal successors, (107), 48 states have internal predecessors, (107), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2022-11-19 07:42:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:42:49,806 INFO L93 Difference]: Finished difference Result 297 states and 307 transitions. [2022-11-19 07:42:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-19 07:42:49,806 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 2.14) internal successors, (107), 48 states have internal predecessors, (107), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) Word has length 87 [2022-11-19 07:42:49,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:42:49,808 INFO L225 Difference]: With dead ends: 297 [2022-11-19 07:42:49,808 INFO L226 Difference]: Without dead ends: 295 [2022-11-19 07:42:49,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 219 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4157 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1081, Invalid=12259, Unknown=0, NotChecked=0, Total=13340 [2022-11-19 07:42:49,809 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 432 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:42:49,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 1044 Invalid, 2666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2492 Invalid, 0 Unknown, 81 Unchecked, 1.3s Time] [2022-11-19 07:42:49,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-11-19 07:42:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 145. [2022-11-19 07:42:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 119 states have (on average 1.0672268907563025) internal successors, (127), 119 states have internal predecessors, (127), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:42:49,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2022-11-19 07:42:49,909 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 87 [2022-11-19 07:42:49,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:42:49,910 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2022-11-19 07:42:49,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 2.14) internal successors, (107), 48 states have internal predecessors, (107), 22 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2022-11-19 07:42:49,910 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2022-11-19 07:42:49,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-19 07:42:49,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:42:49,911 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:42:49,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-19 07:42:50,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:42:50,111 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:42:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:42:50,112 INFO L85 PathProgramCache]: Analyzing trace with hash -215296732, now seen corresponding path program 25 times [2022-11-19 07:42:50,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:42:50,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683412853] [2022-11-19 07:42:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:42:50,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:42:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 12 proven. 263 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-19 07:42:51,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:42:51,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683412853] [2022-11-19 07:42:51,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683412853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:42:51,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142223677] [2022-11-19 07:42:51,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:42:51,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:42:51,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:42:51,278 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:42:51,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-19 07:42:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:51,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-19 07:42:51,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:42:52,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:42:52,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:52,169 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 25 treesize of output 24 [2022-11-19 07:42:52,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:52,306 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 25 treesize of output 24 [2022-11-19 07:42:52,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:52,460 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 25 treesize of output 24 [2022-11-19 07:42:52,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:42:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 73 proven. 261 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-19 07:42:52,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:42:53,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 18 [2022-11-19 07:42:53,177 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 28 treesize of output 24 [2022-11-19 07:42:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 9 proven. 263 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-19 07:42:53,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142223677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:42:53,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2008927193] [2022-11-19 07:42:53,491 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:42:53,491 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:42:53,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:42:53,492 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:42:53,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:42:53,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:53,561 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:42:53,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:42:53,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:53,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:42:53,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:53,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:42:54,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:54,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:54,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:42:54,153 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:42:54,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:42:54,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:42:54,337 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:42:54,338 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:42:55,767 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18604#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:42:55,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:42:55,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:42:55,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 25] total 54 [2022-11-19 07:42:55,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968352194] [2022-11-19 07:42:55,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:42:55,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-19 07:42:55,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:42:55,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-19 07:42:55,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=3985, Unknown=0, NotChecked=0, Total=4290 [2022-11-19 07:42:55,770 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 54 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 49 states have internal predecessors, (109), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 26 states have call predecessors, (26), 25 states have call successors, (26) [2022-11-19 07:42:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:42:58,419 INFO L93 Difference]: Finished difference Result 305 states and 315 transitions. [2022-11-19 07:42:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-19 07:42:58,420 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 49 states have internal predecessors, (109), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 26 states have call predecessors, (26), 25 states have call successors, (26) Word has length 89 [2022-11-19 07:42:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:42:58,422 INFO L225 Difference]: With dead ends: 305 [2022-11-19 07:42:58,422 INFO L226 Difference]: Without dead ends: 303 [2022-11-19 07:42:58,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 219 SyntacticMatches, 11 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4019 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=903, Invalid=11529, Unknown=0, NotChecked=0, Total=12432 [2022-11-19 07:42:58,430 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 372 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 2000 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:42:58,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 828 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2000 Invalid, 0 Unknown, 49 Unchecked, 1.1s Time] [2022-11-19 07:42:58,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-19 07:42:58,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 122. [2022-11-19 07:42:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 96 states have (on average 1.0729166666666667) internal successors, (103), 96 states have internal predecessors, (103), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:42:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2022-11-19 07:42:58,551 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 89 [2022-11-19 07:42:58,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:42:58,551 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2022-11-19 07:42:58,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 49 states have internal predecessors, (109), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 26 states have call predecessors, (26), 25 states have call successors, (26) [2022-11-19 07:42:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2022-11-19 07:42:58,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-19 07:42:58,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:42:58,553 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:42:58,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-19 07:42:58,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 07:42:58,759 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:42:58,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:42:58,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2003522715, now seen corresponding path program 26 times [2022-11-19 07:42:58,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:42:58,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097410875] [2022-11-19 07:42:58,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:42:58,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:42:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:42:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 11 proven. 280 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-19 07:42:59,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:42:59,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097410875] [2022-11-19 07:42:59,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097410875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:42:59,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100593383] [2022-11-19 07:42:59,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:42:59,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:42:59,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:42:59,809 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:42:59,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-19 07:43:00,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-19 07:43:00,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:43:00,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-19 07:43:00,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:00,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:43:01,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-19 07:43:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 14 proven. 284 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-19 07:43:01,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:02,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:43:02,247 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 24 treesize of output 20 [2022-11-19 07:43:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 11 proven. 280 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-19 07:43:03,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100593383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:03,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1915449268] [2022-11-19 07:43:03,045 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:43:03,045 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:43:03,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:43:03,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:43:03,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:43:03,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:03,128 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:43:03,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:43:03,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:03,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:43:03,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:03,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:43:03,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:03,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:03,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:03,615 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:43:03,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:43:03,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:43:03,768 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:43:03,769 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:43:05,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19917#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:43:05,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:43:05,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:43:05,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 74 [2022-11-19 07:43:05,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595442543] [2022-11-19 07:43:05,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:43:05,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-19 07:43:05,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:43:05,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-19 07:43:05,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=6666, Unknown=0, NotChecked=0, Total=7310 [2022-11-19 07:43:05,322 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand has 74 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 69 states have internal predecessors, (157), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-19 07:43:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:13,472 INFO L93 Difference]: Finished difference Result 316 states and 335 transitions. [2022-11-19 07:43:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-11-19 07:43:13,473 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 69 states have internal predecessors, (157), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 90 [2022-11-19 07:43:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:13,475 INFO L225 Difference]: With dead ends: 316 [2022-11-19 07:43:13,475 INFO L226 Difference]: Without dead ends: 314 [2022-11-19 07:43:13,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12968 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=3102, Invalid=36300, Unknown=0, NotChecked=0, Total=39402 [2022-11-19 07:43:13,492 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 505 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 3177 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 3478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 3177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:13,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 1015 Invalid, 3478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 3177 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-19 07:43:13,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-19 07:43:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 128. [2022-11-19 07:43:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 102 states have (on average 1.0686274509803921) internal successors, (109), 102 states have internal predecessors, (109), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:43:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2022-11-19 07:43:13,605 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 90 [2022-11-19 07:43:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:13,605 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2022-11-19 07:43:13,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 69 states have internal predecessors, (157), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-19 07:43:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2022-11-19 07:43:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-19 07:43:13,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:13,607 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:43:13,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:13,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:13,813 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:13,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:13,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1846080164, now seen corresponding path program 27 times [2022-11-19 07:43:13,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:43:13,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026065598] [2022-11-19 07:43:13,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:13,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:43:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 261 proven. 110 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-19 07:43:14,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:43:14,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026065598] [2022-11-19 07:43:14,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026065598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:43:14,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001724142] [2022-11-19 07:43:14,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:43:14,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:14,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:14,297 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:14,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-19 07:43:14,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:43:14,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:43:14,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:43:14,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 231 proven. 70 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:43:14,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 231 proven. 70 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:43:14,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001724142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:14,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1111479167] [2022-11-19 07:43:14,895 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:43:14,895 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:43:14,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:43:14,895 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:43:14,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:43:14,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:14,953 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:43:14,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:43:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:14,990 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:43:14,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:43:15,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:15,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:43:15,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:15,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:15,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:15,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:15,495 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:43:15,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:43:15,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:43:15,708 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:43:15,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:43:16,762 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21347#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:43:16,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:43:16,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:43:16,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 18] total 35 [2022-11-19 07:43:16,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351081612] [2022-11-19 07:43:16,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:43:16,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:43:16,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:43:16,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:43:16,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1830, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 07:43:16,765 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-19 07:43:17,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:17,284 INFO L93 Difference]: Finished difference Result 270 states and 279 transitions. [2022-11-19 07:43:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:43:17,284 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 90 [2022-11-19 07:43:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:17,286 INFO L225 Difference]: With dead ends: 270 [2022-11-19 07:43:17,286 INFO L226 Difference]: Without dead ends: 224 [2022-11-19 07:43:17,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 233 SyntacticMatches, 15 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=444, Invalid=2418, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 07:43:17,287 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 66 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:17,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 137 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:43:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-19 07:43:17,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 128. [2022-11-19 07:43:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 102 states have internal predecessors, (108), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:43:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2022-11-19 07:43:17,408 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 90 [2022-11-19 07:43:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:17,409 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2022-11-19 07:43:17,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-19 07:43:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2022-11-19 07:43:17,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-19 07:43:17,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:17,409 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:43:17,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:17,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:17,610 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:17,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:17,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1506251484, now seen corresponding path program 28 times [2022-11-19 07:43:17,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:43:17,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124033360] [2022-11-19 07:43:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:17,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:43:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 11 proven. 313 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-19 07:43:18,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:43:18,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124033360] [2022-11-19 07:43:18,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124033360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:43:18,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233721570] [2022-11-19 07:43:18,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:43:18,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:18,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:18,699 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:18,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-19 07:43:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:18,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-19 07:43:18,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:19,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:43:19,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:19,723 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 25 treesize of output 24 [2022-11-19 07:43:20,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:43:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 33 proven. 313 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-19 07:43:20,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:20,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:43:20,527 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 31 treesize of output 27 [2022-11-19 07:43:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 11 proven. 313 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-19 07:43:20,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233721570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:20,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1897580931] [2022-11-19 07:43:20,766 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:43:20,766 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:43:20,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:43:20,767 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:43:20,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:43:20,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:20,828 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:43:20,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:43:20,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:20,872 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:43:20,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:43:21,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:21,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:43:21,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:21,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:21,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:21,378 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:43:21,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:43:21,434 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 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:43:21,513 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:43:21,514 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:43:22,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22556#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:43:22,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:43:22,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:43:22,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 28] total 56 [2022-11-19 07:43:22,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060406818] [2022-11-19 07:43:22,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:43:22,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-19 07:43:22,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:43:22,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-19 07:43:22,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=4253, Unknown=0, NotChecked=0, Total=4556 [2022-11-19 07:43:22,985 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand has 56 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 52 states have internal predecessors, (117), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-19 07:43:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:25,949 INFO L93 Difference]: Finished difference Result 282 states and 290 transitions. [2022-11-19 07:43:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-19 07:43:25,949 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 52 states have internal predecessors, (117), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) Word has length 95 [2022-11-19 07:43:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:25,951 INFO L225 Difference]: With dead ends: 282 [2022-11-19 07:43:25,951 INFO L226 Difference]: Without dead ends: 280 [2022-11-19 07:43:25,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 241 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=891, Invalid=12449, Unknown=0, NotChecked=0, Total=13340 [2022-11-19 07:43:25,953 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 382 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 2677 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:25,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 1200 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2677 Invalid, 0 Unknown, 86 Unchecked, 1.3s Time] [2022-11-19 07:43:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-19 07:43:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 154. [2022-11-19 07:43:26,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 128 states have (on average 1.0546875) internal successors, (135), 128 states have internal predecessors, (135), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:43:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 163 transitions. [2022-11-19 07:43:26,085 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 163 transitions. Word has length 95 [2022-11-19 07:43:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:26,085 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 163 transitions. [2022-11-19 07:43:26,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 52 states have internal predecessors, (117), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-19 07:43:26,086 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 163 transitions. [2022-11-19 07:43:26,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-19 07:43:26,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:26,087 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 12, 12, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:43:26,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:26,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:26,292 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:26,293 INFO L85 PathProgramCache]: Analyzing trace with hash -376975517, now seen corresponding path program 29 times [2022-11-19 07:43:26,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:43:26,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687838455] [2022-11-19 07:43:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:26,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:43:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 13 proven. 321 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-19 07:43:27,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:43:27,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687838455] [2022-11-19 07:43:27,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687838455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:43:27,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676246763] [2022-11-19 07:43:27,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:43:27,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:27,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:27,588 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:27,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-19 07:43:28,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-19 07:43:28,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:43:28,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-19 07:43:28,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:28,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:43:28,927 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-19 07:43:28,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 07:43:29,013 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-19 07:43:29,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 07:43:29,153 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-19 07:43:29,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 07:43:29,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-19 07:43:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 76 proven. 324 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-19 07:43:29,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:29,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 18 [2022-11-19 07:43:29,801 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 28 treesize of output 24 [2022-11-19 07:43:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 10 proven. 321 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-19 07:43:30,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676246763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:30,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1351281487] [2022-11-19 07:43:30,093 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:43:30,093 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:43:30,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:43:30,094 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:43:30,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:43:30,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:30,159 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:43:30,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:43:30,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:30,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:43:30,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:30,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:43:30,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:30,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:30,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:30,617 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:43:30,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:43:30,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:43:30,779 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:43:30,780 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:43:32,209 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23907#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:43:32,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:43:32,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:43:32,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 27] total 53 [2022-11-19 07:43:32,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934245423] [2022-11-19 07:43:32,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:43:32,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-19 07:43:32,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:43:32,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-19 07:43:32,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=3900, Unknown=0, NotChecked=0, Total=4160 [2022-11-19 07:43:32,214 INFO L87 Difference]: Start difference. First operand 154 states and 163 transitions. Second operand has 53 states, 51 states have (on average 2.196078431372549) internal successors, (112), 48 states have internal predecessors, (112), 24 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (28), 26 states have call predecessors, (28), 24 states have call successors, (28) [2022-11-19 07:43:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:35,374 INFO L93 Difference]: Finished difference Result 301 states and 309 transitions. [2022-11-19 07:43:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-19 07:43:35,374 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 2.196078431372549) internal successors, (112), 48 states have internal predecessors, (112), 24 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (28), 26 states have call predecessors, (28), 24 states have call successors, (28) Word has length 97 [2022-11-19 07:43:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:35,376 INFO L225 Difference]: With dead ends: 301 [2022-11-19 07:43:35,376 INFO L226 Difference]: Without dead ends: 299 [2022-11-19 07:43:35,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4251 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=800, Invalid=12310, Unknown=0, NotChecked=0, Total=13110 [2022-11-19 07:43:35,377 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 230 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 3060 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 3195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 3060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:35,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 1353 Invalid, 3195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 3060 Invalid, 0 Unknown, 57 Unchecked, 1.5s Time] [2022-11-19 07:43:35,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-19 07:43:35,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 125. [2022-11-19 07:43:35,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 100 states have (on average 1.05) internal successors, (105), 100 states have internal predecessors, (105), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 07:43:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 131 transitions. [2022-11-19 07:43:35,524 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 131 transitions. Word has length 97 [2022-11-19 07:43:35,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:35,525 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 131 transitions. [2022-11-19 07:43:35,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 2.196078431372549) internal successors, (112), 48 states have internal predecessors, (112), 24 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (28), 26 states have call predecessors, (28), 24 states have call successors, (28) [2022-11-19 07:43:35,525 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 131 transitions. [2022-11-19 07:43:35,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-19 07:43:35,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:35,526 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:43:35,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:35,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:35,732 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:35,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:35,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1085860196, now seen corresponding path program 30 times [2022-11-19 07:43:35,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:43:35,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162294349] [2022-11-19 07:43:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:35,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:43:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 12 proven. 341 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-19 07:43:36,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:43:36,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162294349] [2022-11-19 07:43:36,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162294349] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:43:36,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384794500] [2022-11-19 07:43:36,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:43:36,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:36,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:36,818 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:36,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-19 07:43:36,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:43:36,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:43:37,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-19 07:43:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:37,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:43:38,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:43:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 18 proven. 343 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-19 07:43:38,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:38,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:43:38,672 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 24 treesize of output 20 [2022-11-19 07:43:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 12 proven. 341 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-19 07:43:38,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384794500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:38,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1492133817] [2022-11-19 07:43:38,954 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:43:38,955 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:43:38,955 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:43:38,955 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:43:38,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:43:38,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:39,019 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:43:39,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:43:39,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:39,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:43:39,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:39,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:43:39,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:39,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:39,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:39,540 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:43:39,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:43:39,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:43:39,720 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:43:39,721 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:43:41,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25256#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:43:41,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:43:41,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:43:41,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 29] total 57 [2022-11-19 07:43:41,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875414302] [2022-11-19 07:43:41,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:43:41,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-19 07:43:41,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:43:41,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-19 07:43:41,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=4405, Unknown=0, NotChecked=0, Total=4692 [2022-11-19 07:43:41,236 INFO L87 Difference]: Start difference. First operand 125 states and 131 transitions. Second operand has 57 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 53 states have internal predecessors, (122), 24 states have call successors, (25), 1 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-19 07:43:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:44,320 INFO L93 Difference]: Finished difference Result 272 states and 281 transitions. [2022-11-19 07:43:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-19 07:43:44,320 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 53 states have internal predecessors, (122), 24 states have call successors, (25), 1 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) Word has length 98 [2022-11-19 07:43:44,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:44,322 INFO L225 Difference]: With dead ends: 272 [2022-11-19 07:43:44,322 INFO L226 Difference]: Without dead ends: 270 [2022-11-19 07:43:44,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 251 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3047 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=748, Invalid=10382, Unknown=0, NotChecked=0, Total=11130 [2022-11-19 07:43:44,323 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 250 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 3322 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 3382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 3322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:44,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1333 Invalid, 3382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 3322 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-19 07:43:44,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-19 07:43:44,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 128. [2022-11-19 07:43:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 102 states have internal predecessors, (108), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:43:44,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2022-11-19 07:43:44,437 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 98 [2022-11-19 07:43:44,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:44,437 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2022-11-19 07:43:44,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 53 states have internal predecessors, (122), 24 states have call successors, (25), 1 states have call predecessors, (25), 2 states have return successors, (25), 25 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-19 07:43:44,438 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2022-11-19 07:43:44,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-19 07:43:44,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:44,439 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:43:44,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:44,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-19 07:43:44,642 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash -827063004, now seen corresponding path program 31 times [2022-11-19 07:43:44,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:43:44,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949422055] [2022-11-19 07:43:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:44,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:43:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 156 proven. 207 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-19 07:43:45,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:43:45,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949422055] [2022-11-19 07:43:45,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949422055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:43:45,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266952902] [2022-11-19 07:43:45,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:43:45,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:45,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:45,080 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:45,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-19 07:43:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:45,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:43:45,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 187 proven. 176 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-19 07:43:45,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 187 proven. 176 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-19 07:43:45,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266952902] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:45,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [681757520] [2022-11-19 07:43:45,993 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:43:45,994 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:43:45,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:43:45,994 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:43:45,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:43:46,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:46,052 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:43:46,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:43:46,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:46,089 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:43:46,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:43:46,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:46,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:43:46,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:46,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:46,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:46,547 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:43:46,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:43:46,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:43:46,700 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:43:46,701 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:43:47,823 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26547#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:43:47,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:43:47,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:43:47,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2022-11-19 07:43:47,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287680980] [2022-11-19 07:43:47,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:43:47,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-19 07:43:47,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:43:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-19 07:43:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2223, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 07:43:47,826 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand has 40 states, 40 states have (on average 2.625) internal successors, (105), 40 states have internal predecessors, (105), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-11-19 07:43:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:49,221 INFO L93 Difference]: Finished difference Result 262 states and 271 transitions. [2022-11-19 07:43:49,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-19 07:43:49,222 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 40 states have internal predecessors, (105), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 101 [2022-11-19 07:43:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:49,222 INFO L225 Difference]: With dead ends: 262 [2022-11-19 07:43:49,222 INFO L226 Difference]: Without dead ends: 111 [2022-11-19 07:43:49,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 254 SyntacticMatches, 23 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3015 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1406, Invalid=7150, Unknown=0, NotChecked=0, Total=8556 [2022-11-19 07:43:49,224 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 262 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:49,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 181 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:43:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-19 07:43:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 98. [2022-11-19 07:43:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:43:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-11-19 07:43:49,316 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 101 [2022-11-19 07:43:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:49,317 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-11-19 07:43:49,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 40 states have internal predecessors, (105), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-11-19 07:43:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-11-19 07:43:49,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-19 07:43:49,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:49,318 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 12, 12, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:43:49,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:49,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-19 07:43:49,524 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:49,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1109031971, now seen corresponding path program 32 times [2022-11-19 07:43:49,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:43:49,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477115873] [2022-11-19 07:43:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:49,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:43:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 377 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-19 07:43:50,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:43:50,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477115873] [2022-11-19 07:43:50,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477115873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:43:50,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728487525] [2022-11-19 07:43:50,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:43:50,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:50,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:50,752 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:50,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-19 07:43:51,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-19 07:43:51,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:43:51,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-19 07:43:51,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:51,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 07:43:55,906 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-19 07:43:55,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-11-19 07:43:56,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-19 07:43:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 35 proven. 386 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-19 07:43:56,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:56,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728487525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:43:56,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1149809340] [2022-11-19 07:43:56,625 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:43:56,625 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:43:56,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:43:56,625 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:43:56,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:43:56,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:56,684 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:43:56,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:43:56,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:56,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:43:56,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:56,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:43:57,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:57,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:57,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:57,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:57,193 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:43:57,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:43:57,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:43:57,379 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:43:57,380 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:02,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27614#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:44:02,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:02,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:44:02,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 44 [2022-11-19 07:44:02,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708637959] [2022-11-19 07:44:02,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:02,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-19 07:44:02,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:02,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-19 07:44:02,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3086, Unknown=3, NotChecked=0, Total=3306 [2022-11-19 07:44:02,547 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 44 states, 43 states have (on average 2.255813953488372) internal successors, (97), 41 states have internal predecessors, (97), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) [2022-11-19 07:44:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:03,885 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2022-11-19 07:44:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-19 07:44:03,886 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.255813953488372) internal successors, (97), 41 states have internal predecessors, (97), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) Word has length 103 [2022-11-19 07:44:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:03,887 INFO L225 Difference]: With dead ends: 144 [2022-11-19 07:44:03,887 INFO L226 Difference]: Without dead ends: 142 [2022-11-19 07:44:03,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 208 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=350, Invalid=5049, Unknown=3, NotChecked=0, Total=5402 [2022-11-19 07:44:03,888 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 81 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:03,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 496 Invalid, 1725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1573 Invalid, 0 Unknown, 128 Unchecked, 0.8s Time] [2022-11-19 07:44:03,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-19 07:44:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 106. [2022-11-19 07:44:03,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 07:44:03,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2022-11-19 07:44:03,958 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 103 [2022-11-19 07:44:03,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:03,958 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2022-11-19 07:44:03,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.255813953488372) internal successors, (97), 41 states have internal predecessors, (97), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) [2022-11-19 07:44:03,959 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2022-11-19 07:44:03,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 07:44:03,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:03,959 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:03,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:04,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:04,160 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:04,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:04,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2006448635, now seen corresponding path program 33 times [2022-11-19 07:44:04,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:04,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373873192] [2022-11-19 07:44:04,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:04,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 13 proven. 408 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-19 07:44:05,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:05,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373873192] [2022-11-19 07:44:05,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373873192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:05,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753311376] [2022-11-19 07:44:05,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:44:05,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:05,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:05,693 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:05,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-19 07:44:05,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:44:05,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:44:05,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-19 07:44:05,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:06,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:44:07,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-11-19 07:44:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 20 proven. 410 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-19 07:44:07,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:07,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:44:07,559 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 24 treesize of output 20 [2022-11-19 07:44:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 13 proven. 408 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-19 07:44:08,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753311376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:08,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1675658626] [2022-11-19 07:44:08,331 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:44:08,332 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:08,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:08,332 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:08,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:08,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:08,392 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:44:08,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:44:08,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:08,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:44:08,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:08,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:44:08,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:08,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:08,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:08,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:08,873 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:44:08,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:44:08,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:44:09,058 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:44:09,059 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:10,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28731#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:44:10,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:10,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:10,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 31] total 74 [2022-11-19 07:44:10,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529103691] [2022-11-19 07:44:10,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:10,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-19 07:44:10,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-19 07:44:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=6902, Unknown=0, NotChecked=0, Total=7310 [2022-11-19 07:44:10,662 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand has 74 states, 72 states have (on average 2.138888888888889) internal successors, (154), 68 states have internal predecessors, (154), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) [2022-11-19 07:44:14,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:14,469 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2022-11-19 07:44:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-19 07:44:14,469 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 72 states have (on average 2.138888888888889) internal successors, (154), 68 states have internal predecessors, (154), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) Word has length 106 [2022-11-19 07:44:14,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:14,470 INFO L225 Difference]: With dead ends: 160 [2022-11-19 07:44:14,470 INFO L226 Difference]: Without dead ends: 158 [2022-11-19 07:44:14,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 262 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4687 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=981, Invalid=14769, Unknown=0, NotChecked=0, Total=15750 [2022-11-19 07:44:14,472 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 321 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 3222 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:14,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1214 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3222 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-19 07:44:14,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-19 07:44:14,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 109. [2022-11-19 07:44:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 07:44:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2022-11-19 07:44:14,545 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 106 [2022-11-19 07:44:14,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:14,546 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2022-11-19 07:44:14,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 72 states have (on average 2.138888888888889) internal successors, (154), 68 states have internal predecessors, (154), 38 states have call successors, (39), 1 states have call predecessors, (39), 2 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) [2022-11-19 07:44:14,546 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2022-11-19 07:44:14,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:44:14,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:14,547 INFO L195 NwaCegarLoop]: trace histogram [15, 13, 13, 13, 13, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:14,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:14,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-19 07:44:14,747 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1590806724, now seen corresponding path program 34 times [2022-11-19 07:44:14,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:14,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112572000] [2022-11-19 07:44:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:14,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 12 proven. 416 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-19 07:44:16,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:16,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112572000] [2022-11-19 07:44:16,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112572000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:16,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60784833] [2022-11-19 07:44:16,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:44:16,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:16,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:16,149 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:16,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-19 07:44:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:16,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-19 07:44:16,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:17,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:44:17,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:17,296 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 25 treesize of output 24 [2022-11-19 07:44:17,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:17,454 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 25 treesize of output 24 [2022-11-19 07:44:18,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:44:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 62 proven. 422 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-19 07:44:18,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:18,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60784833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:18,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [849136644] [2022-11-19 07:44:18,406 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:44:18,407 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:18,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:18,407 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:18,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:18,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:18,470 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:44:18,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:44:18,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:18,510 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:44:18,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:44:18,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:18,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:44:18,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:18,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:18,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:18,982 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:44:18,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:44:19,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:44:19,135 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:44:19,136 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:20,678 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29707#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:44:20,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:20,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:44:20,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33] total 61 [2022-11-19 07:44:20,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591614538] [2022-11-19 07:44:20,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:20,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-19 07:44:20,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:20,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-19 07:44:20,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=5207, Unknown=0, NotChecked=0, Total=5550 [2022-11-19 07:44:20,680 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 61 states, 59 states have (on average 2.152542372881356) internal successors, (127), 57 states have internal predecessors, (127), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2022-11-19 07:44:23,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:23,365 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2022-11-19 07:44:23,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-19 07:44:23,366 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 2.152542372881356) internal successors, (127), 57 states have internal predecessors, (127), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) Word has length 108 [2022-11-19 07:44:23,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:23,366 INFO L225 Difference]: With dead ends: 151 [2022-11-19 07:44:23,366 INFO L226 Difference]: Without dead ends: 149 [2022-11-19 07:44:23,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 207 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3163 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=750, Invalid=9756, Unknown=0, NotChecked=0, Total=10506 [2022-11-19 07:44:23,368 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 272 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 2655 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:23,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 893 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2655 Invalid, 0 Unknown, 66 Unchecked, 1.3s Time] [2022-11-19 07:44:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-19 07:44:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 111. [2022-11-19 07:44:23,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 07:44:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-11-19 07:44:23,447 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 108 [2022-11-19 07:44:23,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:23,448 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-11-19 07:44:23,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 2.152542372881356) internal successors, (127), 57 states have internal predecessors, (127), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2022-11-19 07:44:23,448 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-11-19 07:44:23,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:44:23,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:23,449 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:23,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:23,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-19 07:44:23,654 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:23,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:23,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1045915421, now seen corresponding path program 35 times [2022-11-19 07:44:23,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:23,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619400004] [2022-11-19 07:44:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:23,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 188 proven. 244 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-19 07:44:24,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:24,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619400004] [2022-11-19 07:44:24,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619400004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:24,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678966799] [2022-11-19 07:44:24,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:44:24,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:24,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:24,119 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:24,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-19 07:44:24,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-19 07:44:24,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:44:24,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 07:44:24,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 222 proven. 210 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-19 07:44:25,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 222 proven. 210 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-19 07:44:25,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678966799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:25,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [215084913] [2022-11-19 07:44:25,568 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:44:25,569 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:25,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:25,569 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:25,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:25,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:25,627 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:44:25,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:44:25,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:25,664 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:44:25,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:44:25,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:25,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:44:26,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:26,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:26,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:26,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:26,128 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:44:26,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:44:26,219 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 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:44:26,300 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:44:26,301 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:27,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30853#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:44:27,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:27,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:27,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2022-11-19 07:44:27,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001895347] [2022-11-19 07:44:27,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:27,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-19 07:44:27,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:27,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-19 07:44:27,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=2484, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 07:44:27,461 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 43 states have internal predecessors, (113), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-19 07:44:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:28,052 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2022-11-19 07:44:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 07:44:28,052 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 43 states have internal predecessors, (113), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 109 [2022-11-19 07:44:28,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:28,053 INFO L225 Difference]: With dead ends: 163 [2022-11-19 07:44:28,053 INFO L226 Difference]: Without dead ends: 121 [2022-11-19 07:44:28,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 275 SyntacticMatches, 25 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=768, Invalid=3654, Unknown=0, NotChecked=0, Total=4422 [2022-11-19 07:44:28,055 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 107 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:28,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 179 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:44:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-19 07:44:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 108. [2022-11-19 07:44:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 07:44:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2022-11-19 07:44:28,147 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 109 [2022-11-19 07:44:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:28,148 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2022-11-19 07:44:28,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 43 states have internal predecessors, (113), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-19 07:44:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2022-11-19 07:44:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 07:44:28,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:28,149 INFO L195 NwaCegarLoop]: trace histogram [15, 13, 13, 13, 13, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:28,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:28,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:28,356 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:28,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:28,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1059482052, now seen corresponding path program 36 times [2022-11-19 07:44:28,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:28,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85885191] [2022-11-19 07:44:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:28,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 13 proven. 447 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-19 07:44:29,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:29,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85885191] [2022-11-19 07:44:29,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85885191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635353847] [2022-11-19 07:44:29,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:44:29,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:29,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:29,990 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:29,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-19 07:44:30,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:44:30,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:44:30,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-19 07:44:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:31,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:44:31,244 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 23 treesize of output 22 [2022-11-19 07:44:31,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:31,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:44:31,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-11-19 07:44:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 39 proven. 447 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-19 07:44:31,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:32,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635353847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:32,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972912665] [2022-11-19 07:44:32,322 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:44:32,322 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:32,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:32,322 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:32,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:32,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,383 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:44:32,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:44:32,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,420 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:44:32,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:44:32,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:44:32,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,922 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:44:32,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:44:33,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:44:33,115 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:44:33,116 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:34,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31799#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:44:34,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:34,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:44:34,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 35] total 52 [2022-11-19 07:44:34,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273772860] [2022-11-19 07:44:34,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:34,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-19 07:44:34,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:34,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-19 07:44:34,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=5772, Unknown=0, NotChecked=0, Total=6162 [2022-11-19 07:44:34,634 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 52 states, 50 states have (on average 2.02) internal successors, (101), 48 states have internal predecessors, (101), 28 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2022-11-19 07:44:36,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:36,386 INFO L93 Difference]: Finished difference Result 167 states and 172 transitions. [2022-11-19 07:44:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-19 07:44:36,387 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 2.02) internal successors, (101), 48 states have internal predecessors, (101), 28 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) Word has length 111 [2022-11-19 07:44:36,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:36,388 INFO L225 Difference]: With dead ends: 167 [2022-11-19 07:44:36,388 INFO L226 Difference]: Without dead ends: 165 [2022-11-19 07:44:36,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 215 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3499 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=672, Invalid=9428, Unknown=0, NotChecked=0, Total=10100 [2022-11-19 07:44:36,389 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 214 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:36,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 398 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1665 Invalid, 0 Unknown, 50 Unchecked, 0.9s Time] [2022-11-19 07:44:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-19 07:44:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 116. [2022-11-19 07:44:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 07:44:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-11-19 07:44:36,504 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 111 [2022-11-19 07:44:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:36,505 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-11-19 07:44:36,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 2.02) internal successors, (101), 48 states have internal predecessors, (101), 28 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2022-11-19 07:44:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-11-19 07:44:36,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:44:36,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:36,506 INFO L195 NwaCegarLoop]: trace histogram [15, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:36,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-19 07:44:36,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-19 07:44:36,712 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:36,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:36,713 INFO L85 PathProgramCache]: Analyzing trace with hash -679335740, now seen corresponding path program 37 times [2022-11-19 07:44:36,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:36,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693951926] [2022-11-19 07:44:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:36,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 14 proven. 481 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-19 07:44:37,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:37,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693951926] [2022-11-19 07:44:37,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693951926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:37,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309894689] [2022-11-19 07:44:37,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:44:37,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:37,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:37,991 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:38,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-19 07:44:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:38,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-19 07:44:38,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:39,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:44:40,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:44:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 22 proven. 483 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-19 07:44:40,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:40,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:44:40,341 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 24 treesize of output 20 [2022-11-19 07:44:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 14 proven. 481 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-19 07:44:40,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309894689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:40,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [708057230] [2022-11-19 07:44:40,696 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:44:40,696 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:40,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:40,696 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:40,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:40,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,752 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:44:40,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:44:40,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,788 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:44:40,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:44:40,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:44:41,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,277 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:44:41,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:44:41,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:44:41,470 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:44:41,471 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:43,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33015#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:44:43,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:43,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:43,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 33] total 67 [2022-11-19 07:44:43,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686545245] [2022-11-19 07:44:43,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:43,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-19 07:44:43,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:43,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-19 07:44:43,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=5832, Unknown=0, NotChecked=0, Total=6162 [2022-11-19 07:44:43,126 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 67 states, 64 states have (on average 2.25) internal successors, (144), 62 states have internal predecessors, (144), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 29 states have call successors, (30) [2022-11-19 07:44:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:46,395 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2022-11-19 07:44:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-19 07:44:46,396 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 64 states have (on average 2.25) internal successors, (144), 62 states have internal predecessors, (144), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 29 states have call successors, (30) Word has length 114 [2022-11-19 07:44:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:46,397 INFO L225 Difference]: With dead ends: 173 [2022-11-19 07:44:46,397 INFO L226 Difference]: Without dead ends: 171 [2022-11-19 07:44:46,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 295 SyntacticMatches, 3 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4063 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=870, Invalid=13892, Unknown=0, NotChecked=0, Total=14762 [2022-11-19 07:44:46,399 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 393 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 3285 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:46,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 1272 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3285 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-19 07:44:46,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-19 07:44:46,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 119. [2022-11-19 07:44:46,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 07:44:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2022-11-19 07:44:46,516 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 114 [2022-11-19 07:44:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:46,516 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2022-11-19 07:44:46,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 64 states have (on average 2.25) internal successors, (144), 62 states have internal predecessors, (144), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 29 states have call successors, (30) [2022-11-19 07:44:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2022-11-19 07:44:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:44:46,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:46,518 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 14, 14, 14, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:46,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:46,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:46,724 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:46,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:46,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1155237221, now seen corresponding path program 38 times [2022-11-19 07:44:46,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:46,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967101588] [2022-11-19 07:44:46,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:46,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 13 proven. 489 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-19 07:44:48,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:48,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967101588] [2022-11-19 07:44:48,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967101588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:48,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129510697] [2022-11-19 07:44:48,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:44:48,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:48,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:48,379 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:48,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-19 07:44:49,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-19 07:44:49,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:44:49,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-19 07:44:49,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:49,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:44:49,786 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-19 07:44:49,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 07:44:49,904 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-19 07:44:49,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 07:44:50,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-19 07:44:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 74 proven. 489 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-19 07:44:50,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:51,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129510697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:51,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1228510041] [2022-11-19 07:44:51,002 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:44:51,002 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:51,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:51,003 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:51,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:51,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:51,073 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:44:51,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:44:51,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:51,113 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:44:51,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:44:51,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:51,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:44:51,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:51,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:51,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:51,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:51,602 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:44:51,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:44:51,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:44:51,791 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:44:51,792 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:53,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34079#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:44:53,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:53,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:44:53,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 65 [2022-11-19 07:44:53,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094442060] [2022-11-19 07:44:53,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:53,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-19 07:44:53,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:53,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-19 07:44:53,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=7564, Unknown=0, NotChecked=0, Total=8010 [2022-11-19 07:44:53,188 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 65 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 61 states have internal predecessors, (137), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2022-11-19 07:44:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:56,990 INFO L93 Difference]: Finished difference Result 162 states and 166 transitions. [2022-11-19 07:44:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-19 07:44:56,991 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 61 states have internal predecessors, (137), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) Word has length 116 [2022-11-19 07:44:56,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:56,991 INFO L225 Difference]: With dead ends: 162 [2022-11-19 07:44:56,991 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 07:44:56,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 215 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5425 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=898, Invalid=13382, Unknown=0, NotChecked=0, Total=14280 [2022-11-19 07:44:56,992 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 209 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 2668 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 2804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:56,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1027 Invalid, 2804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2668 Invalid, 0 Unknown, 72 Unchecked, 1.4s Time] [2022-11-19 07:44:56,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 07:44:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 119. [2022-11-19 07:44:57,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 07:44:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2022-11-19 07:44:57,100 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 116 [2022-11-19 07:44:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:57,100 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2022-11-19 07:44:57,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 61 states have internal predecessors, (137), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2022-11-19 07:44:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2022-11-19 07:44:57,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:44:57,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:57,102 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:57,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:57,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:57,311 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:57,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:57,311 INFO L85 PathProgramCache]: Analyzing trace with hash -199620156, now seen corresponding path program 39 times [2022-11-19 07:44:57,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:57,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097021821] [2022-11-19 07:44:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:57,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 223 proven. 284 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-19 07:44:57,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:57,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097021821] [2022-11-19 07:44:57,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097021821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:57,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423007611] [2022-11-19 07:44:57,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:44:57,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:57,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:57,966 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:57,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-19 07:44:58,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:44:58,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:44:58,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 07:44:58,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 260 proven. 247 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-19 07:44:58,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 260 proven. 247 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-19 07:44:59,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423007611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:59,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556904423] [2022-11-19 07:44:59,089 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:44:59,089 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:59,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:59,090 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:59,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:59,154 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:44:59,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:44:59,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:59,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:44:59,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:59,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:44:59,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:59,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:59,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:59,656 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:44:59,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:44:59,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:44:59,795 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:44:59,796 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:45:00,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35307#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:45:00,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:45:00,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:45:00,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2022-11-19 07:45:00,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132886985] [2022-11-19 07:45:00,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:45:00,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-19 07:45:00,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:45:00,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-19 07:45:00,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=2759, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 07:45:00,980 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 46 states have internal predecessors, (121), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-11-19 07:45:01,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:45:01,708 INFO L93 Difference]: Finished difference Result 174 states and 179 transitions. [2022-11-19 07:45:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:45:01,709 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 46 states have internal predecessors, (121), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 117 [2022-11-19 07:45:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:45:01,710 INFO L225 Difference]: With dead ends: 174 [2022-11-19 07:45:01,710 INFO L226 Difference]: Without dead ends: 129 [2022-11-19 07:45:01,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 296 SyntacticMatches, 27 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2111 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=872, Invalid=4098, Unknown=0, NotChecked=0, Total=4970 [2022-11-19 07:45:01,713 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 170 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:45:01,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 177 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:45:01,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-19 07:45:01,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 116. [2022-11-19 07:45:01,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 07:45:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2022-11-19 07:45:01,809 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 117 [2022-11-19 07:45:01,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:45:01,810 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2022-11-19 07:45:01,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 46 states have internal predecessors, (121), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-11-19 07:45:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2022-11-19 07:45:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-19 07:45:01,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:45:01,811 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 14, 14, 14, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:45:01,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-19 07:45:02,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:02,012 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:45:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:45:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash 104619395, now seen corresponding path program 40 times [2022-11-19 07:45:02,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:45:02,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875464270] [2022-11-19 07:45:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:02,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:45:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 14 proven. 523 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-19 07:45:03,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:45:03,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875464270] [2022-11-19 07:45:03,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875464270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:45:03,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60202096] [2022-11-19 07:45:03,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:45:03,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:03,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:03,358 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:03,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-19 07:45:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:03,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-19 07:45:03,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:45:04,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:45:04,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:04,740 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 25 treesize of output 24 [2022-11-19 07:45:05,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:45:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 42 proven. 523 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-19 07:45:05,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:45:05,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:45:05,890 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 31 treesize of output 27 [2022-11-19 07:45:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 14 proven. 523 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-19 07:45:06,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60202096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:45:06,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1903376331] [2022-11-19 07:45:06,257 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:45:06,257 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:45:06,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:45:06,258 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:45:06,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:45:06,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:06,317 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:45:06,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:45:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:06,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:45:06,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:06,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:45:06,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:06,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:06,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:06,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:06,794 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:45:06,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:45:06,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:45:06,969 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:45:06,970 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:45:08,675 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36547#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:45:08,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:45:08,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:45:08,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 34] total 70 [2022-11-19 07:45:08,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097599129] [2022-11-19 07:45:08,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:45:08,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-19 07:45:08,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:45:08,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-19 07:45:08,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=6273, Unknown=0, NotChecked=0, Total=6642 [2022-11-19 07:45:08,677 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 70 states, 67 states have (on average 2.2238805970149254) internal successors, (149), 65 states have internal predecessors, (149), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 32 states have call predecessors, (32), 31 states have call successors, (32) [2022-11-19 07:45:10,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:45:10,551 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-11-19 07:45:10,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-19 07:45:10,552 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 67 states have (on average 2.2238805970149254) internal successors, (149), 65 states have internal predecessors, (149), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 32 states have call predecessors, (32), 31 states have call successors, (32) Word has length 119 [2022-11-19 07:45:10,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:45:10,553 INFO L225 Difference]: With dead ends: 124 [2022-11-19 07:45:10,553 INFO L226 Difference]: Without dead ends: 122 [2022-11-19 07:45:10,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 306 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2999 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=544, Invalid=9356, Unknown=0, NotChecked=0, Total=9900 [2022-11-19 07:45:10,554 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 248 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 2651 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 2754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:45:10,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 912 Invalid, 2754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2651 Invalid, 0 Unknown, 45 Unchecked, 1.3s Time] [2022-11-19 07:45:10,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-19 07:45:10,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2022-11-19 07:45:10,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 07:45:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2022-11-19 07:45:10,697 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 119 [2022-11-19 07:45:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:45:10,698 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2022-11-19 07:45:10,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 67 states have (on average 2.2238805970149254) internal successors, (149), 65 states have internal predecessors, (149), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 32 states have call predecessors, (32), 31 states have call successors, (32) [2022-11-19 07:45:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2022-11-19 07:45:10,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 07:45:10,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:45:10,699 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:45:10,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-19 07:45:10,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:10,905 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:45:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:45:10,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1424349019, now seen corresponding path program 41 times [2022-11-19 07:45:10,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:45:10,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759870421] [2022-11-19 07:45:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:10,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:45:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 15 proven. 560 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-19 07:45:12,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:45:12,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759870421] [2022-11-19 07:45:12,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759870421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:45:12,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013030149] [2022-11-19 07:45:12,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:45:12,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:12,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:12,143 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:12,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-19 07:45:12,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-19 07:45:12,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:45:12,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-19 07:45:12,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:45:13,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:45:14,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-19 07:45:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 15 proven. 560 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-19 07:45:14,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:45:16,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:45:16,058 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 24 treesize of output 20 [2022-11-19 07:45:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 15 proven. 560 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-19 07:45:17,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013030149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:45:17,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1648996981] [2022-11-19 07:45:17,304 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:45:17,304 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:45:17,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:45:17,304 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:45:17,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:45:17,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:17,366 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:45:17,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:45:17,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:17,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:45:17,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:17,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:45:17,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:17,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:17,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:17,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:17,850 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:45:17,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:45:17,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:45:18,040 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:45:18,041 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:45:19,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37782#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:45:19,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:45:19,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:45:19,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 98 [2022-11-19 07:45:19,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518548756] [2022-11-19 07:45:19,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:45:19,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-19 07:45:19,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:45:19,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-19 07:45:19,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=10988, Unknown=0, NotChecked=0, Total=11990 [2022-11-19 07:45:19,922 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 98 states, 96 states have (on average 2.2604166666666665) internal successors, (217), 93 states have internal predecessors, (217), 43 states have call successors, (44), 1 states have call predecessors, (44), 2 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) [2022-11-19 07:45:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:45:28,178 INFO L93 Difference]: Finished difference Result 222 states and 242 transitions. [2022-11-19 07:45:28,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-19 07:45:28,179 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 96 states have (on average 2.2604166666666665) internal successors, (217), 93 states have internal predecessors, (217), 43 states have call successors, (44), 1 states have call predecessors, (44), 2 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) Word has length 122 [2022-11-19 07:45:28,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:45:28,180 INFO L225 Difference]: With dead ends: 222 [2022-11-19 07:45:28,180 INFO L226 Difference]: Without dead ends: 220 [2022-11-19 07:45:28,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10688 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=3053, Invalid=30987, Unknown=0, NotChecked=0, Total=34040 [2022-11-19 07:45:28,184 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 606 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 3982 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 4215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 3982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:45:28,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 1351 Invalid, 4215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 3982 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-19 07:45:28,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-19 07:45:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 167. [2022-11-19 07:45:28,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 17 states have call successors, (17), 14 states have call predecessors, (17), 14 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-19 07:45:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 172 transitions. [2022-11-19 07:45:28,383 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 172 transitions. Word has length 122 [2022-11-19 07:45:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:45:28,383 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 172 transitions. [2022-11-19 07:45:28,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 96 states have (on average 2.2604166666666665) internal successors, (217), 93 states have internal predecessors, (217), 43 states have call successors, (44), 1 states have call predecessors, (44), 2 states have return successors, (45), 45 states have call predecessors, (45), 43 states have call successors, (45) [2022-11-19 07:45:28,384 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 172 transitions. [2022-11-19 07:45:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 07:45:28,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:45:28,384 INFO L195 NwaCegarLoop]: trace histogram [17, 15, 15, 15, 15, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:45:28,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-19 07:45:28,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-19 07:45:28,585 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:45:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:45:28,585 INFO L85 PathProgramCache]: Analyzing trace with hash 91172452, now seen corresponding path program 42 times [2022-11-19 07:45:28,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:45:28,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669123918] [2022-11-19 07:45:28,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:28,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:45:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 15 proven. 605 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-19 07:45:30,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:45:30,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669123918] [2022-11-19 07:45:30,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669123918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:45:30,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149472395] [2022-11-19 07:45:30,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:45:30,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:30,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:30,068 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:30,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-19 07:45:30,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:45:30,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:45:30,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-19 07:45:30,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:45:31,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:45:31,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:31,702 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 25 treesize of output 24 [2022-11-19 07:45:32,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:45:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 45 proven. 605 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-19 07:45:32,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:45:33,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:45:33,110 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 31 treesize of output 27 [2022-11-19 07:45:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 15 proven. 605 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-19 07:45:33,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149472395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:45:33,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1070988509] [2022-11-19 07:45:33,479 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:45:33,479 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:45:33,479 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:45:33,480 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:45:33,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:45:33,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:33,541 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:45:33,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:45:33,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:33,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:45:33,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:33,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:45:34,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:34,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:34,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:34,039 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:45:34,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:45:34,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:45:34,180 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:45:34,181 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:45:35,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39334#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:45:35,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:45:35,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:45:35,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 39, 37] total 76 [2022-11-19 07:45:35,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075062906] [2022-11-19 07:45:35,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:45:35,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-19 07:45:35,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:45:35,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-19 07:45:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=7253, Unknown=0, NotChecked=0, Total=7656 [2022-11-19 07:45:35,963 INFO L87 Difference]: Start difference. First operand 167 states and 172 transitions. Second operand has 76 states, 73 states have (on average 2.2054794520547945) internal successors, (161), 71 states have internal predecessors, (161), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 34 states have call predecessors, (34), 33 states have call successors, (34) [2022-11-19 07:45:39,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:45:39,769 INFO L93 Difference]: Finished difference Result 220 states and 225 transitions. [2022-11-19 07:45:39,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-19 07:45:39,769 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 73 states have (on average 2.2054794520547945) internal successors, (161), 71 states have internal predecessors, (161), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 34 states have call predecessors, (34), 33 states have call successors, (34) Word has length 127 [2022-11-19 07:45:39,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:45:39,770 INFO L225 Difference]: With dead ends: 220 [2022-11-19 07:45:39,770 INFO L226 Difference]: Without dead ends: 218 [2022-11-19 07:45:39,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 326 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6222 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1120, Invalid=19186, Unknown=0, NotChecked=0, Total=20306 [2022-11-19 07:45:39,772 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 401 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 3395 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 3607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 3395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:45:39,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 1218 Invalid, 3607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 3395 Invalid, 0 Unknown, 80 Unchecked, 1.7s Time] [2022-11-19 07:45:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-19 07:45:40,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2022-11-19 07:45:40,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-19 07:45:40,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2022-11-19 07:45:40,008 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 127 [2022-11-19 07:45:40,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:45:40,008 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2022-11-19 07:45:40,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 73 states have (on average 2.2054794520547945) internal successors, (161), 71 states have internal predecessors, (161), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 34 states have call predecessors, (34), 33 states have call successors, (34) [2022-11-19 07:45:40,009 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2022-11-19 07:45:40,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-19 07:45:40,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:45:40,010 INFO L195 NwaCegarLoop]: trace histogram [17, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:45:40,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-19 07:45:40,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-19 07:45:40,217 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:45:40,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:45:40,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1704697892, now seen corresponding path program 43 times [2022-11-19 07:45:40,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:45:40,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387833961] [2022-11-19 07:45:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:40,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:45:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 16 proven. 645 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-19 07:45:41,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:45:41,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387833961] [2022-11-19 07:45:41,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387833961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:45:41,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922491134] [2022-11-19 07:45:41,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:45:41,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:41,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:41,559 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:41,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-19 07:45:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:41,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-19 07:45:41,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:45:43,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:45:44,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:45:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 26 proven. 647 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-11-19 07:45:44,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:45:44,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:45:44,333 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 24 treesize of output 20 [2022-11-19 07:45:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 16 proven. 645 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-19 07:45:44,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922491134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:45:44,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697724359] [2022-11-19 07:45:44,678 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:45:44,678 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:45:44,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:45:44,678 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:45:44,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:45:44,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:44,750 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:45:44,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:45:44,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:44,789 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:45:44,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:45:44,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:44,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:45:45,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:45,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:45,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:45,317 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:45:45,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:45:45,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:45:45,456 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:45:45,459 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:45:47,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40863#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:45:47,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:45:47,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:45:47,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 37] total 73 [2022-11-19 07:45:47,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809587199] [2022-11-19 07:45:47,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:45:47,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-19 07:45:47,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:45:47,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-19 07:45:47,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=6785, Unknown=0, NotChecked=0, Total=7140 [2022-11-19 07:45:47,230 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand has 73 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 69 states have internal predecessors, (162), 32 states have call successors, (33), 1 states have call predecessors, (33), 2 states have return successors, (33), 33 states have call predecessors, (33), 32 states have call successors, (33) [2022-11-19 07:45:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:45:52,013 INFO L93 Difference]: Finished difference Result 274 states and 281 transitions. [2022-11-19 07:45:52,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-19 07:45:52,013 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 69 states have internal predecessors, (162), 32 states have call successors, (33), 1 states have call predecessors, (33), 2 states have return successors, (33), 33 states have call predecessors, (33), 32 states have call successors, (33) Word has length 130 [2022-11-19 07:45:52,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:45:52,014 INFO L225 Difference]: With dead ends: 274 [2022-11-19 07:45:52,014 INFO L226 Difference]: Without dead ends: 272 [2022-11-19 07:45:52,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 339 SyntacticMatches, 4 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4965 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=968, Invalid=16854, Unknown=0, NotChecked=0, Total=17822 [2022-11-19 07:45:52,015 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 402 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 5578 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1965 SdHoareTripleChecker+Invalid, 5671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 5578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:45:52,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1965 Invalid, 5671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 5578 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-19 07:45:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-19 07:45:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 172. [2022-11-19 07:45:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 138 states have internal predecessors, (142), 18 states have call successors, (18), 15 states have call predecessors, (18), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-19 07:45:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 178 transitions. [2022-11-19 07:45:52,233 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 178 transitions. Word has length 130 [2022-11-19 07:45:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:45:52,233 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 178 transitions. [2022-11-19 07:45:52,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 69 states have internal predecessors, (162), 32 states have call successors, (33), 1 states have call predecessors, (33), 2 states have return successors, (33), 33 states have call predecessors, (33), 32 states have call successors, (33) [2022-11-19 07:45:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 178 transitions. [2022-11-19 07:45:52,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-19 07:45:52,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:45:52,234 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:45:52,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-19 07:45:52,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:52,435 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:45:52,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:45:52,435 INFO L85 PathProgramCache]: Analyzing trace with hash 967104100, now seen corresponding path program 44 times [2022-11-19 07:45:52,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:45:52,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308260421] [2022-11-19 07:45:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:52,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:45:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 302 proven. 373 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-11-19 07:45:53,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:45:53,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308260421] [2022-11-19 07:45:53,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308260421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:45:53,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234636791] [2022-11-19 07:45:53,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:45:53,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:53,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:53,104 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:53,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-19 07:45:53,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-19 07:45:53,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:45:53,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 07:45:53,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:45:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 345 proven. 330 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-11-19 07:45:54,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:45:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 345 proven. 330 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-11-19 07:45:54,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234636791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:45:54,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1935534064] [2022-11-19 07:45:54,950 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:45:54,950 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:45:54,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:45:54,950 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:45:54,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:45:54,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:55,014 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:45:55,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:45:55,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:55,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:45:55,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:55,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:45:55,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:55,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:55,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:55,483 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:45:55,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:45:55,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:45:55,617 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:45:55,618 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:45:56,875 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42454#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:45:56,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:45:56,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:45:56,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 52 [2022-11-19 07:45:56,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809617498] [2022-11-19 07:45:56,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:45:56,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-19 07:45:56,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:45:56,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-19 07:45:56,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=3351, Unknown=0, NotChecked=0, Total=4032 [2022-11-19 07:45:56,877 INFO L87 Difference]: Start difference. First operand 172 states and 178 transitions. Second operand has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-11-19 07:45:58,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:45:58,206 INFO L93 Difference]: Finished difference Result 277 states and 284 transitions. [2022-11-19 07:45:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-19 07:45:58,206 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 133 [2022-11-19 07:45:58,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:45:58,207 INFO L225 Difference]: With dead ends: 277 [2022-11-19 07:45:58,207 INFO L226 Difference]: Without dead ends: 143 [2022-11-19 07:45:58,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 338 SyntacticMatches, 31 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1537, Invalid=7205, Unknown=0, NotChecked=0, Total=8742 [2022-11-19 07:45:58,208 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 266 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:45:58,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 270 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:45:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-19 07:45:58,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 130. [2022-11-19 07:45:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 18 states have call successors, (18), 15 states have call predecessors, (18), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-19 07:45:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-11-19 07:45:58,325 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 133 [2022-11-19 07:45:58,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:45:58,326 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-11-19 07:45:58,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-11-19 07:45:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-11-19 07:45:58,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-19 07:45:58,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:45:58,327 INFO L195 NwaCegarLoop]: trace histogram [18, 16, 16, 16, 16, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:45:58,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-19 07:45:58,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-19 07:45:58,527 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:45:58,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:45:58,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1876265245, now seen corresponding path program 45 times [2022-11-19 07:45:58,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:45:58,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868905884] [2022-11-19 07:45:58,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:58,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:45:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 16 proven. 693 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-19 07:45:59,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:45:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868905884] [2022-11-19 07:45:59,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868905884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:45:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26117585] [2022-11-19 07:45:59,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:45:59,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:59,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:59,948 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:59,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-19 07:46:00,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:46:00,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:46:00,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-19 07:46:00,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:01,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:46:01,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:01,674 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 25 treesize of output 24 [2022-11-19 07:46:02,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:46:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 48 proven. 693 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-19 07:46:02,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:46:03,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:46:03,196 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 31 treesize of output 27 [2022-11-19 07:46:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 16 proven. 693 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-19 07:46:03,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26117585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:46:03,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019360709] [2022-11-19 07:46:03,523 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:46:03,523 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:46:03,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:46:03,524 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:46:03,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:46:03,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:03,590 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:46:03,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:46:03,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:03,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:46:03,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:03,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:46:04,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:04,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:04,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:04,063 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:46:04,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:46:04,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:46:04,199 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:46:04,200 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:46:06,015 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43993#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:46:06,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:46:06,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:46:06,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 41, 39] total 78 [2022-11-19 07:46:06,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831240340] [2022-11-19 07:46:06,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:46:06,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-19 07:46:06,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:06,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-19 07:46:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=7597, Unknown=0, NotChecked=0, Total=8010 [2022-11-19 07:46:06,018 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 78 states, 76 states have (on average 2.223684210526316) internal successors, (169), 74 states have internal predecessors, (169), 34 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2022-11-19 07:46:08,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:08,579 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2022-11-19 07:46:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-19 07:46:08,580 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 76 states have (on average 2.223684210526316) internal successors, (169), 74 states have internal predecessors, (169), 34 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) Word has length 135 [2022-11-19 07:46:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:08,581 INFO L225 Difference]: With dead ends: 140 [2022-11-19 07:46:08,581 INFO L226 Difference]: Without dead ends: 138 [2022-11-19 07:46:08,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 349 SyntacticMatches, 6 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3918 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=644, Invalid=12012, Unknown=0, NotChecked=0, Total=12656 [2022-11-19 07:46:08,583 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 346 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 3765 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 3896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:08,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1170 Invalid, 3896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3765 Invalid, 0 Unknown, 52 Unchecked, 1.8s Time] [2022-11-19 07:46:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-19 07:46:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2022-11-19 07:46:08,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-19 07:46:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-11-19 07:46:08,696 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 135 [2022-11-19 07:46:08,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:08,696 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-11-19 07:46:08,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 76 states have (on average 2.223684210526316) internal successors, (169), 74 states have internal predecessors, (169), 34 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2022-11-19 07:46:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-11-19 07:46:08,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-19 07:46:08,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:08,697 INFO L195 NwaCegarLoop]: trace histogram [18, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:08,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-19 07:46:08,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-19 07:46:08,902 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:08,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:08,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1108012219, now seen corresponding path program 46 times [2022-11-19 07:46:08,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:08,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519383992] [2022-11-19 07:46:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:08,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 17 proven. 736 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-19 07:46:10,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519383992] [2022-11-19 07:46:10,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519383992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:10,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956317153] [2022-11-19 07:46:10,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:46:10,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:10,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:10,455 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:10,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-19 07:46:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:10,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-19 07:46:10,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:12,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:46:13,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:46:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 17 proven. 736 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-19 07:46:13,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:46:13,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:46:13,470 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 24 treesize of output 20 [2022-11-19 07:46:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 17 proven. 736 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-19 07:46:13,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956317153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:46:13,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1637367766] [2022-11-19 07:46:13,814 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:46:13,814 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:46:13,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:46:13,814 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:46:13,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:46:13,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:13,877 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:46:13,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:46:13,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:13,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:46:14,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:14,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:46:14,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:14,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:14,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:14,349 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:46:14,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:46:14,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:46:14,491 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:46:14,492 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:46:16,320 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45362#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:46:16,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:46:16,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:46:16,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 39] total 77 [2022-11-19 07:46:16,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284441837] [2022-11-19 07:46:16,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:46:16,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-19 07:46:16,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:16,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-19 07:46:16,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=7460, Unknown=0, NotChecked=0, Total=7832 [2022-11-19 07:46:16,322 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 77 states, 75 states have (on average 2.2933333333333334) internal successors, (172), 73 states have internal predecessors, (172), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2022-11-19 07:46:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:20,727 INFO L93 Difference]: Finished difference Result 202 states and 208 transitions. [2022-11-19 07:46:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-19 07:46:20,727 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 2.2933333333333334) internal successors, (172), 73 states have internal predecessors, (172), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) Word has length 138 [2022-11-19 07:46:20,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:20,728 INFO L225 Difference]: With dead ends: 202 [2022-11-19 07:46:20,728 INFO L226 Difference]: Without dead ends: 200 [2022-11-19 07:46:20,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 361 SyntacticMatches, 4 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5522 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1023, Invalid=18717, Unknown=0, NotChecked=0, Total=19740 [2022-11-19 07:46:20,729 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 379 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 4607 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 4706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:20,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1575 Invalid, 4706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4607 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-19 07:46:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-19 07:46:20,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 141. [2022-11-19 07:46:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 19 states have call successors, (19), 16 states have call predecessors, (19), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-19 07:46:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2022-11-19 07:46:20,858 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 138 [2022-11-19 07:46:20,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:20,859 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2022-11-19 07:46:20,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 2.2933333333333334) internal successors, (172), 73 states have internal predecessors, (172), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2022-11-19 07:46:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2022-11-19 07:46:20,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 07:46:20,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:20,860 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:20,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-11-19 07:46:21,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-19 07:46:21,062 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:21,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:21,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1962835037, now seen corresponding path program 47 times [2022-11-19 07:46:21,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:21,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255193308] [2022-11-19 07:46:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:21,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 346 proven. 422 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-19 07:46:21,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:21,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255193308] [2022-11-19 07:46:21,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255193308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:21,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106189690] [2022-11-19 07:46:21,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:46:21,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:21,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:21,832 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:21,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-19 07:46:22,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-11-19 07:46:22,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:46:22,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-19 07:46:22,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 392 proven. 376 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-19 07:46:23,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:46:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 392 proven. 376 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-19 07:46:24,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106189690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:46:24,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [120288501] [2022-11-19 07:46:24,192 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:46:24,192 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:46:24,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:46:24,192 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:46:24,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:46:24,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:24,250 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:46:24,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:46:24,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:24,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:46:24,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:24,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:46:24,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:24,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:24,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:24,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:24,738 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:46:24,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:46:24,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:46:24,919 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:46:24,920 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:46:26,198 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46875#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:46:26,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:46:26,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:46:26,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 55 [2022-11-19 07:46:26,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305493222] [2022-11-19 07:46:26,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:46:26,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-19 07:46:26,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-19 07:46:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=3668, Unknown=0, NotChecked=0, Total=4422 [2022-11-19 07:46:26,200 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand has 55 states, 55 states have (on average 2.6363636363636362) internal successors, (145), 55 states have internal predecessors, (145), 18 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-11-19 07:46:27,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:27,142 INFO L93 Difference]: Finished difference Result 205 states and 211 transitions. [2022-11-19 07:46:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-19 07:46:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.6363636363636362) internal successors, (145), 55 states have internal predecessors, (145), 18 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 141 [2022-11-19 07:46:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:27,143 INFO L225 Difference]: With dead ends: 205 [2022-11-19 07:46:27,143 INFO L226 Difference]: Without dead ends: 151 [2022-11-19 07:46:27,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 359 SyntacticMatches, 33 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2891 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1226, Invalid=5580, Unknown=0, NotChecked=0, Total=6806 [2022-11-19 07:46:27,144 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 225 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:27,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 259 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:46:27,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-19 07:46:27,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 138. [2022-11-19 07:46:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 19 states have call successors, (19), 16 states have call predecessors, (19), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-19 07:46:27,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-11-19 07:46:27,274 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 141 [2022-11-19 07:46:27,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:27,274 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-11-19 07:46:27,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.6363636363636362) internal successors, (145), 55 states have internal predecessors, (145), 18 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-11-19 07:46:27,274 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-11-19 07:46:27,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 07:46:27,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:27,275 INFO L195 NwaCegarLoop]: trace histogram [19, 17, 17, 17, 17, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:27,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:27,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-11-19 07:46:27,478 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:27,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1314700036, now seen corresponding path program 48 times [2022-11-19 07:46:27,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:27,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913222589] [2022-11-19 07:46:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:27,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 17 proven. 787 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-19 07:46:29,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:29,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913222589] [2022-11-19 07:46:29,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913222589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:29,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056803252] [2022-11-19 07:46:29,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:46:29,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:29,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:29,074 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:29,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-19 07:46:29,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:46:29,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:46:29,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-19 07:46:29,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:30,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:46:30,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:30,936 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 25 treesize of output 24 [2022-11-19 07:46:32,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:46:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 51 proven. 787 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-19 07:46:32,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:46:32,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:46:32,618 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 31 treesize of output 27 [2022-11-19 07:46:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 17 proven. 787 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-19 07:46:32,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056803252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:46:32,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1016313435] [2022-11-19 07:46:32,970 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:46:32,970 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:46:32,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:46:32,971 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:46:32,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:46:33,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:33,029 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:46:33,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:46:33,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:33,066 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:46:33,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:46:33,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:33,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:46:33,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:33,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:33,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:33,539 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:46:33,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:46:33,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:46:33,680 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:46:33,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:46:35,560 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48355#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:46:35,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:46:35,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:46:35,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 43, 41] total 82 [2022-11-19 07:46:35,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988222525] [2022-11-19 07:46:35,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:46:35,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-19 07:46:35,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:35,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-19 07:46:35,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=8308, Unknown=0, NotChecked=0, Total=8742 [2022-11-19 07:46:35,562 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 82 states, 80 states have (on average 2.2125) internal successors, (177), 78 states have internal predecessors, (177), 36 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2022-11-19 07:46:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:38,621 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2022-11-19 07:46:38,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-19 07:46:38,621 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 80 states have (on average 2.2125) internal successors, (177), 78 states have internal predecessors, (177), 36 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) Word has length 143 [2022-11-19 07:46:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:38,622 INFO L225 Difference]: With dead ends: 148 [2022-11-19 07:46:38,622 INFO L226 Difference]: Without dead ends: 146 [2022-11-19 07:46:38,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 370 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4192 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=663, Invalid=12909, Unknown=0, NotChecked=0, Total=13572 [2022-11-19 07:46:38,624 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 193 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 4705 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1652 SdHoareTripleChecker+Invalid, 4861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 4705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:38,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1652 Invalid, 4861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 4705 Invalid, 0 Unknown, 101 Unchecked, 2.3s Time] [2022-11-19 07:46:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-19 07:46:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2022-11-19 07:46:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-19 07:46:38,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2022-11-19 07:46:38,816 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 143 [2022-11-19 07:46:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:38,816 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2022-11-19 07:46:38,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 80 states have (on average 2.2125) internal successors, (177), 78 states have internal predecessors, (177), 36 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2022-11-19 07:46:38,816 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2022-11-19 07:46:38,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 07:46:38,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:38,818 INFO L195 NwaCegarLoop]: trace histogram [19, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:38,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:39,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:39,030 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:39,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:39,030 INFO L85 PathProgramCache]: Analyzing trace with hash 427511684, now seen corresponding path program 49 times [2022-11-19 07:46:39,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:39,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401339568] [2022-11-19 07:46:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:39,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 18 proven. 833 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-19 07:46:40,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:40,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401339568] [2022-11-19 07:46:40,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401339568] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:40,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644114380] [2022-11-19 07:46:40,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:46:40,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:40,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:40,639 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:40,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-19 07:46:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:40,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-19 07:46:40,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:42,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:46:43,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:46:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 29 proven. 836 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-11-19 07:46:43,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:46:43,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:46:43,979 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 24 treesize of output 20 [2022-11-19 07:46:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 18 proven. 833 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-19 07:46:44,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644114380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:46:44,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [779843231] [2022-11-19 07:46:44,351 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:46:44,351 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:46:44,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:46:44,351 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:46:44,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:46:44,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:44,410 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:46:44,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:46:44,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:44,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:46:44,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:44,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:46:44,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:44,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:44,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:44,884 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:46:44,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:46:44,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:46:45,027 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:46:45,028 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:46:46,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49799#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:46:46,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:46:46,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:46:46,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 41] total 81 [2022-11-19 07:46:46,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115909070] [2022-11-19 07:46:46,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:46:46,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-19 07:46:46,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:46,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-19 07:46:46,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=8167, Unknown=0, NotChecked=0, Total=8556 [2022-11-19 07:46:46,923 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 81 states, 79 states have (on average 2.3037974683544302) internal successors, (182), 77 states have internal predecessors, (182), 36 states have call successors, (37), 1 states have call predecessors, (37), 2 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2022-11-19 07:46:51,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:51,565 INFO L93 Difference]: Finished difference Result 213 states and 219 transitions. [2022-11-19 07:46:51,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-19 07:46:51,565 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 79 states have (on average 2.3037974683544302) internal successors, (182), 77 states have internal predecessors, (182), 36 states have call successors, (37), 1 states have call predecessors, (37), 2 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) Word has length 146 [2022-11-19 07:46:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:51,567 INFO L225 Difference]: With dead ends: 213 [2022-11-19 07:46:51,567 INFO L226 Difference]: Without dead ends: 211 [2022-11-19 07:46:51,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 383 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6102 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1078, Invalid=20678, Unknown=0, NotChecked=0, Total=21756 [2022-11-19 07:46:51,568 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 362 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 4694 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 1714 SdHoareTripleChecker+Invalid, 4803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 4694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:51,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 1714 Invalid, 4803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 4694 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 07:46:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-19 07:46:51,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 149. [2022-11-19 07:46:51,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 20 states have call successors, (20), 17 states have call predecessors, (20), 17 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-19 07:46:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2022-11-19 07:46:51,713 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 146 [2022-11-19 07:46:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:51,713 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2022-11-19 07:46:51,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 79 states have (on average 2.3037974683544302) internal successors, (182), 77 states have internal predecessors, (182), 36 states have call successors, (37), 1 states have call predecessors, (37), 2 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2022-11-19 07:46:51,713 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2022-11-19 07:46:51,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-19 07:46:51,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:51,714 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:51,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:51,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:51,921 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:51,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1428056836, now seen corresponding path program 50 times [2022-11-19 07:46:51,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:51,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060326611] [2022-11-19 07:46:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:51,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 393 proven. 474 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-11-19 07:46:52,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:52,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060326611] [2022-11-19 07:46:52,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060326611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:52,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286144763] [2022-11-19 07:46:52,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:46:52,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:52,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:52,768 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:52,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-19 07:46:54,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-19 07:46:54,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:46:54,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-19 07:46:54,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 442 proven. 425 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-11-19 07:46:55,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:46:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 442 proven. 425 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-11-19 07:46:55,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286144763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:46:55,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1525357034] [2022-11-19 07:46:55,788 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:46:55,788 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:46:55,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:46:55,789 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:46:55,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:46:55,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,846 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:46:55,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:46:55,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:46:55,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:46:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:56,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:56,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:56,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:56,311 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:46:56,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:46:56,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:46:56,502 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:46:56,503 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:46:57,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '51397#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:46:57,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:46:57,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:46:57,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2022-11-19 07:46:57,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839724836] [2022-11-19 07:46:57,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:46:57,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-19 07:46:57,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:57,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-19 07:46:57,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=3999, Unknown=0, NotChecked=0, Total=4830 [2022-11-19 07:46:57,814 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 58 states, 58 states have (on average 2.6379310344827585) internal successors, (153), 58 states have internal predecessors, (153), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-11-19 07:46:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:58,809 INFO L93 Difference]: Finished difference Result 216 states and 222 transitions. [2022-11-19 07:46:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-19 07:46:58,809 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.6379310344827585) internal successors, (153), 58 states have internal predecessors, (153), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 149 [2022-11-19 07:46:58,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:58,810 INFO L225 Difference]: With dead ends: 216 [2022-11-19 07:46:58,810 INFO L226 Difference]: Without dead ends: 159 [2022-11-19 07:46:58,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 380 SyntacticMatches, 35 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3177 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1358, Invalid=6124, Unknown=0, NotChecked=0, Total=7482 [2022-11-19 07:46:58,812 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 206 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:58,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 236 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:46:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-19 07:46:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 146. [2022-11-19 07:46:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 20 states have call successors, (20), 17 states have call predecessors, (20), 17 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-19 07:46:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2022-11-19 07:46:58,968 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 149 [2022-11-19 07:46:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:58,968 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2022-11-19 07:46:58,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.6379310344827585) internal successors, (153), 58 states have internal predecessors, (153), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-11-19 07:46:58,968 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2022-11-19 07:46:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-19 07:46:58,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:58,969 INFO L195 NwaCegarLoop]: trace histogram [20, 18, 18, 18, 18, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:58,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:59,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:59,177 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:59,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1772435389, now seen corresponding path program 51 times [2022-11-19 07:46:59,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:59,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130925546] [2022-11-19 07:46:59,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:59,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 18 proven. 887 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-11-19 07:47:00,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:00,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130925546] [2022-11-19 07:47:00,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130925546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:00,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111421197] [2022-11-19 07:47:00,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:47:00,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:00,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:00,982 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:00,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-19 07:47:01,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:47:01,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:47:01,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-19 07:47:01,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:02,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:47:03,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:03,186 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 25 treesize of output 24 [2022-11-19 07:47:04,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:47:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 54 proven. 887 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-19 07:47:04,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:04,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:47:04,988 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 31 treesize of output 27 [2022-11-19 07:47:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 18 proven. 887 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-11-19 07:47:05,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111421197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:05,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1943290242] [2022-11-19 07:47:05,437 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:47:05,437 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:05,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:05,438 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:05,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:05,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:05,497 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:47:05,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:47:05,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:05,550 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:47:05,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:47:05,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:05,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:47:06,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:06,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:06,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:06,024 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:47:06,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:47:06,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:47:06,181 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:47:06,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:47:08,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '52961#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:47:08,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:47:08,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:47:08,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 45, 43] total 88 [2022-11-19 07:47:08,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598577934] [2022-11-19 07:47:08,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:08,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-11-19 07:47:08,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:08,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-11-19 07:47:08,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=9440, Unknown=0, NotChecked=0, Total=9900 [2022-11-19 07:47:08,129 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 88 states, 85 states have (on average 2.2470588235294118) internal successors, (191), 83 states have internal predecessors, (191), 39 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (40), 40 states have call predecessors, (40), 39 states have call successors, (40) [2022-11-19 07:47:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:11,699 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2022-11-19 07:47:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-19 07:47:11,699 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 85 states have (on average 2.2470588235294118) internal successors, (191), 83 states have internal predecessors, (191), 39 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (40), 40 states have call predecessors, (40), 39 states have call successors, (40) Word has length 151 [2022-11-19 07:47:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:11,700 INFO L225 Difference]: With dead ends: 156 [2022-11-19 07:47:11,700 INFO L226 Difference]: Without dead ends: 154 [2022-11-19 07:47:11,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 393 SyntacticMatches, 5 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4781 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=711, Invalid=14789, Unknown=0, NotChecked=0, Total=15500 [2022-11-19 07:47:11,701 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 319 mSDsluCounter, 1808 mSDsCounter, 0 mSdLazyCounter, 5135 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 5270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 5135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:11,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1848 Invalid, 5270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 5135 Invalid, 0 Unknown, 59 Unchecked, 2.6s Time] [2022-11-19 07:47:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-19 07:47:11,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2022-11-19 07:47:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-19 07:47:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2022-11-19 07:47:11,835 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 151 [2022-11-19 07:47:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:11,835 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2022-11-19 07:47:11,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 85 states have (on average 2.2470588235294118) internal successors, (191), 83 states have internal predecessors, (191), 39 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (40), 40 states have call predecessors, (40), 39 states have call successors, (40) [2022-11-19 07:47:11,836 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2022-11-19 07:47:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-19 07:47:11,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:11,837 INFO L195 NwaCegarLoop]: trace histogram [20, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:11,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:12,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:12,044 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:12,045 INFO L85 PathProgramCache]: Analyzing trace with hash -289225243, now seen corresponding path program 52 times [2022-11-19 07:47:12,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:12,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195402654] [2022-11-19 07:47:12,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:12,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 19 proven. 936 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-11-19 07:47:13,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:13,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195402654] [2022-11-19 07:47:13,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195402654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:13,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960604815] [2022-11-19 07:47:13,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:47:13,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:13,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:13,731 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:13,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-19 07:47:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:14,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-19 07:47:14,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:15,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:47:17,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:47:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 17 proven. 953 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-19 07:47:17,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:17,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:47:17,691 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 24 treesize of output 20 [2022-11-19 07:47:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 19 proven. 936 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-11-19 07:47:19,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960604815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:19,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [491214478] [2022-11-19 07:47:19,641 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:47:19,642 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:19,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:19,642 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:19,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:19,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:19,711 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:47:19,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:47:19,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:19,764 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:47:19,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:47:19,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:19,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:47:20,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:20,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:20,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:20,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:20,292 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:47:20,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:47:20,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:47:20,496 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:47:20,497 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:47:22,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54508#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:47:22,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:47:22,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:47:22,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 45, 43] total 107 [2022-11-19 07:47:22,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595312873] [2022-11-19 07:47:22,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:22,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-19 07:47:22,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:22,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-19 07:47:22,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=13504, Unknown=0, NotChecked=0, Total=14042 [2022-11-19 07:47:22,704 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 107 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 100 states have internal predecessors, (229), 56 states have call successors, (57), 1 states have call predecessors, (57), 2 states have return successors, (59), 59 states have call predecessors, (59), 56 states have call successors, (59) [2022-11-19 07:47:32,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:32,585 INFO L93 Difference]: Finished difference Result 228 states and 234 transitions. [2022-11-19 07:47:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-11-19 07:47:32,585 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 100 states have internal predecessors, (229), 56 states have call successors, (57), 1 states have call predecessors, (57), 2 states have return successors, (59), 59 states have call predecessors, (59), 56 states have call successors, (59) Word has length 154 [2022-11-19 07:47:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:32,586 INFO L225 Difference]: With dead ends: 228 [2022-11-19 07:47:32,586 INFO L226 Difference]: Without dead ends: 226 [2022-11-19 07:47:32,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 386 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13565 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=2216, Invalid=44656, Unknown=0, NotChecked=0, Total=46872 [2022-11-19 07:47:32,589 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 414 mSDsluCounter, 1924 mSDsCounter, 0 mSdLazyCounter, 7305 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1967 SdHoareTripleChecker+Invalid, 7505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 7305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:32,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1967 Invalid, 7505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 7305 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-19 07:47:32,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-19 07:47:32,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 157. [2022-11-19 07:47:32,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 21 states have call successors, (21), 18 states have call predecessors, (21), 18 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-19 07:47:32,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 162 transitions. [2022-11-19 07:47:32,746 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 162 transitions. Word has length 154 [2022-11-19 07:47:32,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:32,746 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 162 transitions. [2022-11-19 07:47:32,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 100 states have internal predecessors, (229), 56 states have call successors, (57), 1 states have call predecessors, (57), 2 states have return successors, (59), 59 states have call predecessors, (59), 56 states have call successors, (59) [2022-11-19 07:47:32,747 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 162 transitions. [2022-11-19 07:47:32,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-19 07:47:32,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:32,748 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:32,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:32,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-19 07:47:32,955 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:32,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:32,955 INFO L85 PathProgramCache]: Analyzing trace with hash -599307005, now seen corresponding path program 53 times [2022-11-19 07:47:32,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:32,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502014430] [2022-11-19 07:47:32,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:32,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 443 proven. 529 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-11-19 07:47:33,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:33,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502014430] [2022-11-19 07:47:33,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502014430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:33,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984946184] [2022-11-19 07:47:33,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:47:33,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:33,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:33,889 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:33,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-19 07:47:35,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-11-19 07:47:35,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:47:35,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-19 07:47:35,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 495 proven. 477 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-11-19 07:47:36,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 495 proven. 477 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-11-19 07:47:36,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984946184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:36,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1917932569] [2022-11-19 07:47:36,999 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:47:36,999 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:37,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:37,000 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:37,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:37,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:37,073 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:47:37,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:47:37,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:37,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:47:37,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:37,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:47:37,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:37,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:37,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:37,602 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:47:37,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:47:37,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:47:37,743 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:47:37,744 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:47:39,110 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56275#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:47:39,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:47:39,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:47:39,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 61 [2022-11-19 07:47:39,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739795508] [2022-11-19 07:47:39,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:39,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-19 07:47:39,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:39,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-19 07:47:39,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=4344, Unknown=0, NotChecked=0, Total=5256 [2022-11-19 07:47:39,112 INFO L87 Difference]: Start difference. First operand 157 states and 162 transitions. Second operand has 61 states, 61 states have (on average 2.639344262295082) internal successors, (161), 61 states have internal predecessors, (161), 20 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-11-19 07:47:40,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:40,096 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2022-11-19 07:47:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 07:47:40,096 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.639344262295082) internal successors, (161), 61 states have internal predecessors, (161), 20 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 157 [2022-11-19 07:47:40,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:40,097 INFO L225 Difference]: With dead ends: 227 [2022-11-19 07:47:40,098 INFO L226 Difference]: Without dead ends: 167 [2022-11-19 07:47:40,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 401 SyntacticMatches, 37 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3476 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1497, Invalid=6693, Unknown=0, NotChecked=0, Total=8190 [2022-11-19 07:47:40,098 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 219 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:40,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 227 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:47:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-19 07:47:40,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 154. [2022-11-19 07:47:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 21 states have call successors, (21), 18 states have call predecessors, (21), 18 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-19 07:47:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2022-11-19 07:47:40,229 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 157 [2022-11-19 07:47:40,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:40,230 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2022-11-19 07:47:40,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.639344262295082) internal successors, (161), 61 states have internal predecessors, (161), 20 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-11-19 07:47:40,230 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2022-11-19 07:47:40,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-19 07:47:40,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:40,231 INFO L195 NwaCegarLoop]: trace histogram [21, 19, 19, 19, 19, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:40,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:40,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-19 07:47:40,432 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:40,432 INFO L85 PathProgramCache]: Analyzing trace with hash -809955420, now seen corresponding path program 54 times [2022-11-19 07:47:40,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:40,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457277218] [2022-11-19 07:47:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:40,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 19 proven. 993 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-11-19 07:47:42,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:42,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457277218] [2022-11-19 07:47:42,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457277218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:42,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682942113] [2022-11-19 07:47:42,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:47:42,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:42,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:42,375 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:42,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-19 07:47:42,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:47:42,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:47:42,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-19 07:47:42,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:44,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:47:44,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:44,653 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 25 treesize of output 24 [2022-11-19 07:47:46,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:47:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 57 proven. 993 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-11-19 07:47:46,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:46,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:47:46,595 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 31 treesize of output 27 [2022-11-19 07:47:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 19 proven. 993 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-11-19 07:47:46,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682942113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:46,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1531875295] [2022-11-19 07:47:46,995 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:47:46,996 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:46,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:46,996 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:46,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:47,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:47,061 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:47:47,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:47:47,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:47,098 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:47:47,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:47:47,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:47,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:47:47,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:47,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:47,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:47,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:47,553 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:47:47,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:47:47,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:47:47,745 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:47:47,746 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:47:49,730 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '57919#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:47:49,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:47:49,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:47:49,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 47, 45] total 90 [2022-11-19 07:47:49,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208851990] [2022-11-19 07:47:49,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:49,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-19 07:47:49,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:49,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-19 07:47:49,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=9832, Unknown=0, NotChecked=0, Total=10302 [2022-11-19 07:47:49,733 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 90 states, 88 states have (on average 2.2613636363636362) internal successors, (199), 86 states have internal predecessors, (199), 40 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (41), 41 states have call predecessors, (41), 40 states have call successors, (41) [2022-11-19 07:47:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:52,987 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2022-11-19 07:47:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-19 07:47:52,988 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 88 states have (on average 2.2613636363636362) internal successors, (199), 86 states have internal predecessors, (199), 40 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (41), 41 states have call predecessors, (41), 40 states have call successors, (41) Word has length 159 [2022-11-19 07:47:52,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:52,988 INFO L225 Difference]: With dead ends: 164 [2022-11-19 07:47:52,988 INFO L226 Difference]: Without dead ends: 162 [2022-11-19 07:47:52,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 414 SyntacticMatches, 6 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5025 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=731, Invalid=15525, Unknown=0, NotChecked=0, Total=16256 [2022-11-19 07:47:52,989 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 171 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 4862 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 4985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 4862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:52,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1337 Invalid, 4985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 4862 Invalid, 0 Unknown, 61 Unchecked, 2.3s Time] [2022-11-19 07:47:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-19 07:47:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2022-11-19 07:47:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 21 states have call successors, (21), 19 states have call predecessors, (21), 19 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-19 07:47:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2022-11-19 07:47:53,122 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 159 [2022-11-19 07:47:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:53,123 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2022-11-19 07:47:53,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 88 states have (on average 2.2613636363636362) internal successors, (199), 86 states have internal predecessors, (199), 40 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (41), 41 states have call predecessors, (41), 40 states have call successors, (41) [2022-11-19 07:47:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2022-11-19 07:47:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-19 07:47:53,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:53,124 INFO L195 NwaCegarLoop]: trace histogram [21, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:53,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:53,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:53,324 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:53,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:53,325 INFO L85 PathProgramCache]: Analyzing trace with hash -250136860, now seen corresponding path program 55 times [2022-11-19 07:47:53,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:53,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019338507] [2022-11-19 07:47:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:53,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1447 backedges. 20 proven. 1045 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-11-19 07:47:55,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:55,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019338507] [2022-11-19 07:47:55,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019338507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:55,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093834866] [2022-11-19 07:47:55,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:47:55,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:55,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:55,233 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:55,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-19 07:47:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:55,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-19 07:47:55,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:57,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:47:58,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:47:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1447 backedges. 33 proven. 1048 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-11-19 07:47:58,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:59,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:47:59,136 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 24 treesize of output 20 [2022-11-19 07:47:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1447 backedges. 20 proven. 1045 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-11-19 07:47:59,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093834866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:59,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [601688001] [2022-11-19 07:47:59,649 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:47:59,649 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:59,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:59,650 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:59,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:59,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:59,708 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:47:59,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:47:59,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:59,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:47:59,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:59,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:48:00,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:00,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:00,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:00,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:00,198 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:48:00,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:48:00,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:48:00,368 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:48:00,369 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:48:02,406 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59523#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:48:02,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:48:02,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:48:02,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 45] total 91 [2022-11-19 07:48:02,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713059557] [2022-11-19 07:48:02,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:02,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-19 07:48:02,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:02,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-19 07:48:02,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=10074, Unknown=0, NotChecked=0, Total=10506 [2022-11-19 07:48:02,408 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 91 states, 88 states have (on average 2.3181818181818183) internal successors, (204), 86 states have internal predecessors, (204), 41 states have call successors, (42), 1 states have call predecessors, (42), 2 states have return successors, (42), 42 states have call predecessors, (42), 41 states have call successors, (42) [2022-11-19 07:48:08,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:08,727 INFO L93 Difference]: Finished difference Result 235 states and 241 transitions. [2022-11-19 07:48:08,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-19 07:48:08,728 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 88 states have (on average 2.3181818181818183) internal successors, (204), 86 states have internal predecessors, (204), 41 states have call successors, (42), 1 states have call predecessors, (42), 2 states have return successors, (42), 42 states have call predecessors, (42), 41 states have call successors, (42) Word has length 162 [2022-11-19 07:48:08,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:08,729 INFO L225 Difference]: With dead ends: 235 [2022-11-19 07:48:08,729 INFO L226 Difference]: Without dead ends: 233 [2022-11-19 07:48:08,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 427 SyntacticMatches, 3 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7486 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1200, Invalid=25532, Unknown=0, NotChecked=0, Total=26732 [2022-11-19 07:48:08,731 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 533 mSDsluCounter, 2242 mSDsCounter, 0 mSdLazyCounter, 6833 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 2289 SdHoareTripleChecker+Invalid, 6972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 6833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:08,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 2289 Invalid, 6972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 6833 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-19 07:48:08,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-19 07:48:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 165. [2022-11-19 07:48:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 22 states have call successors, (22), 19 states have call predecessors, (22), 19 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-19 07:48:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 170 transitions. [2022-11-19 07:48:08,951 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 170 transitions. Word has length 162 [2022-11-19 07:48:08,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:08,951 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 170 transitions. [2022-11-19 07:48:08,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 88 states have (on average 2.3181818181818183) internal successors, (204), 86 states have internal predecessors, (204), 41 states have call successors, (42), 1 states have call predecessors, (42), 2 states have return successors, (42), 42 states have call predecessors, (42), 41 states have call successors, (42) [2022-11-19 07:48:08,951 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 170 transitions. [2022-11-19 07:48:08,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-19 07:48:08,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:08,952 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:08,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:09,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-19 07:48:09,153 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:09,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:09,153 INFO L85 PathProgramCache]: Analyzing trace with hash -53426268, now seen corresponding path program 56 times [2022-11-19 07:48:09,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:09,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757435888] [2022-11-19 07:48:09,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:09,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 496 proven. 587 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-19 07:48:10,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:10,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757435888] [2022-11-19 07:48:10,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757435888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:10,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465321297] [2022-11-19 07:48:10,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:48:10,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:10,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:10,180 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:10,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-19 07:48:11,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-11-19 07:48:11,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:48:11,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-19 07:48:11,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 551 proven. 532 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-19 07:48:12,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 551 proven. 532 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-19 07:48:13,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465321297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:13,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1711130518] [2022-11-19 07:48:13,458 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:48:13,458 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:48:13,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:48:13,459 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:48:13,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:48:13,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:13,517 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:48:13,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:48:13,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:13,553 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:48:13,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:48:13,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:13,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:48:14,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:14,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:14,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:14,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:14,022 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:48:14,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:48:14,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:48:14,207 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:48:14,208 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:48:15,601 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '61291#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:48:15,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:48:15,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:48:15,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 64 [2022-11-19 07:48:15,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020023381] [2022-11-19 07:48:15,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:15,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-19 07:48:15,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:15,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-19 07:48:15,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=4703, Unknown=0, NotChecked=0, Total=5700 [2022-11-19 07:48:15,603 INFO L87 Difference]: Start difference. First operand 165 states and 170 transitions. Second operand has 64 states, 64 states have (on average 2.640625) internal successors, (169), 64 states have internal predecessors, (169), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-19 07:48:16,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:16,677 INFO L93 Difference]: Finished difference Result 238 states and 244 transitions. [2022-11-19 07:48:16,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-19 07:48:16,677 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.640625) internal successors, (169), 64 states have internal predecessors, (169), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 165 [2022-11-19 07:48:16,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:16,678 INFO L225 Difference]: With dead ends: 238 [2022-11-19 07:48:16,678 INFO L226 Difference]: Without dead ends: 175 [2022-11-19 07:48:16,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 422 SyntacticMatches, 39 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1643, Invalid=7287, Unknown=0, NotChecked=0, Total=8930 [2022-11-19 07:48:16,680 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 244 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:16,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 267 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:48:16,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-19 07:48:16,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 162. [2022-11-19 07:48:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 22 states have call successors, (22), 19 states have call predecessors, (22), 19 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-19 07:48:16,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2022-11-19 07:48:16,825 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 165 [2022-11-19 07:48:16,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:16,826 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2022-11-19 07:48:16,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.640625) internal successors, (169), 64 states have internal predecessors, (169), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-19 07:48:16,826 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2022-11-19 07:48:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-19 07:48:16,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:16,827 INFO L195 NwaCegarLoop]: trace histogram [22, 20, 20, 20, 20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:16,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:17,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-19 07:48:17,036 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:17,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:17,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1631366749, now seen corresponding path program 57 times [2022-11-19 07:48:17,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:17,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350277854] [2022-11-19 07:48:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:17,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 20 proven. 1105 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2022-11-19 07:48:19,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:19,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350277854] [2022-11-19 07:48:19,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350277854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:19,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305292658] [2022-11-19 07:48:19,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:48:19,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:19,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:19,037 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:19,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-19 07:48:19,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:48:19,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:48:19,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-19 07:48:19,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:21,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:48:21,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:21,688 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 25 treesize of output 24 [2022-11-19 07:48:23,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:48:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 60 proven. 1105 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-11-19 07:48:23,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:23,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:48:23,789 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 31 treesize of output 27 [2022-11-19 07:48:24,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 20 proven. 1105 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2022-11-19 07:48:24,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305292658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:24,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [440121748] [2022-11-19 07:48:24,185 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:48:24,185 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:48:24,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:48:24,186 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:48:24,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:48:24,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:24,245 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:48:24,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:48:24,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:24,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:48:24,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:24,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:48:24,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:24,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:24,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:24,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:24,743 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:48:24,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:48:24,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:48:24,919 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:48:24,920 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:48:26,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '63017#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:48:26,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:48:26,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:48:26,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 49, 47] total 94 [2022-11-19 07:48:26,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537903795] [2022-11-19 07:48:26,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:26,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-19 07:48:26,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:26,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-19 07:48:26,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=10641, Unknown=0, NotChecked=0, Total=11130 [2022-11-19 07:48:26,981 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 94 states, 92 states have (on average 2.2717391304347827) internal successors, (209), 90 states have internal predecessors, (209), 42 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (43), 43 states have call predecessors, (43), 42 states have call successors, (43) [2022-11-19 07:48:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:31,037 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-11-19 07:48:31,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-19 07:48:31,038 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 92 states have (on average 2.2717391304347827) internal successors, (209), 90 states have internal predecessors, (209), 42 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (43), 43 states have call predecessors, (43), 42 states have call successors, (43) Word has length 167 [2022-11-19 07:48:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:31,039 INFO L225 Difference]: With dead ends: 172 [2022-11-19 07:48:31,039 INFO L226 Difference]: Without dead ends: 170 [2022-11-19 07:48:31,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 437 SyntacticMatches, 6 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5424 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=760, Invalid=16796, Unknown=0, NotChecked=0, Total=17556 [2022-11-19 07:48:31,041 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 355 mSDsluCounter, 2108 mSDsCounter, 0 mSdLazyCounter, 6513 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 6675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 6513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:31,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 2152 Invalid, 6675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 6513 Invalid, 0 Unknown, 64 Unchecked, 3.1s Time] [2022-11-19 07:48:31,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-19 07:48:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2022-11-19 07:48:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 22 states have call successors, (22), 20 states have call predecessors, (22), 20 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-19 07:48:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2022-11-19 07:48:31,190 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 167 [2022-11-19 07:48:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:31,190 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2022-11-19 07:48:31,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 92 states have (on average 2.2717391304347827) internal successors, (209), 90 states have internal predecessors, (209), 42 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (43), 43 states have call predecessors, (43), 42 states have call successors, (43) [2022-11-19 07:48:31,191 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2022-11-19 07:48:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-19 07:48:31,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:31,192 INFO L195 NwaCegarLoop]: trace histogram [22, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:31,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:31,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:31,398 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:31,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:31,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1808613509, now seen corresponding path program 58 times [2022-11-19 07:48:31,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:31,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898410994] [2022-11-19 07:48:31,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:31,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 21 proven. 1160 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2022-11-19 07:48:33,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:33,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898410994] [2022-11-19 07:48:33,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898410994] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:33,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781151601] [2022-11-19 07:48:33,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:48:33,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:33,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:33,574 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:33,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-19 07:48:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:33,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-19 07:48:33,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:35,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:48:37,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:48:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 38 proven. 1160 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-11-19 07:48:37,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:37,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:48:37,782 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 24 treesize of output 20 [2022-11-19 07:48:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 21 proven. 1160 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2022-11-19 07:48:38,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781151601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:38,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1752464883] [2022-11-19 07:48:38,207 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:48:38,207 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:48:38,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:48:38,208 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:48:38,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:48:38,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:38,265 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:48:38,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:48:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:38,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:48:38,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:38,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:48:38,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:38,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:38,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:38,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:38,747 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:48:38,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:48:38,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:48:38,940 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:48:38,941 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:48:41,012 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64698#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:48:41,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:48:41,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:48:41,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 47] total 93 [2022-11-19 07:48:41,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108982356] [2022-11-19 07:48:41,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:41,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-11-19 07:48:41,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-11-19 07:48:41,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=10480, Unknown=0, NotChecked=0, Total=10920 [2022-11-19 07:48:41,015 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 93 states, 91 states have (on average 2.32967032967033) internal successors, (212), 89 states have internal predecessors, (212), 42 states have call successors, (43), 1 states have call predecessors, (43), 2 states have return successors, (43), 43 states have call predecessors, (43), 42 states have call successors, (43) [2022-11-19 07:48:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:47,811 INFO L93 Difference]: Finished difference Result 246 states and 252 transitions. [2022-11-19 07:48:47,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-19 07:48:47,811 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 91 states have (on average 2.32967032967033) internal successors, (212), 89 states have internal predecessors, (212), 42 states have call successors, (43), 1 states have call predecessors, (43), 2 states have return successors, (43), 43 states have call predecessors, (43), 42 states have call successors, (43) Word has length 170 [2022-11-19 07:48:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:47,813 INFO L225 Difference]: With dead ends: 246 [2022-11-19 07:48:47,813 INFO L226 Difference]: Without dead ends: 244 [2022-11-19 07:48:47,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 449 SyntacticMatches, 4 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8016 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1243, Invalid=27149, Unknown=0, NotChecked=0, Total=28392 [2022-11-19 07:48:47,815 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 411 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 7920 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 8041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 7920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:47,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 2945 Invalid, 8041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 7920 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-19 07:48:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-19 07:48:47,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 173. [2022-11-19 07:48:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 23 states have call successors, (23), 20 states have call predecessors, (23), 20 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-19 07:48:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 178 transitions. [2022-11-19 07:48:47,972 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 178 transitions. Word has length 170 [2022-11-19 07:48:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:47,973 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 178 transitions. [2022-11-19 07:48:47,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 91 states have (on average 2.32967032967033) internal successors, (212), 89 states have internal predecessors, (212), 42 states have call successors, (43), 1 states have call predecessors, (43), 2 states have return successors, (43), 43 states have call predecessors, (43), 42 states have call successors, (43) [2022-11-19 07:48:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 178 transitions. [2022-11-19 07:48:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-19 07:48:47,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:47,974 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:47,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-19 07:48:48,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-11-19 07:48:48,181 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash 45829731, now seen corresponding path program 59 times [2022-11-19 07:48:48,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:48,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372751919] [2022-11-19 07:48:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:48,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 552 proven. 648 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-11-19 07:48:49,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:49,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372751919] [2022-11-19 07:48:49,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372751919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:49,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096493321] [2022-11-19 07:48:49,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:48:49,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:49,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:49,309 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:49,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-19 07:48:51,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-11-19 07:48:51,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:48:51,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-19 07:48:51,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 610 proven. 590 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-11-19 07:48:52,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 610 proven. 590 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-11-19 07:48:53,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096493321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:53,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [857018539] [2022-11-19 07:48:53,439 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:48:53,439 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:48:53,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:48:53,440 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:48:53,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:48:53,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:53,502 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:48:53,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:48:53,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:53,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:48:53,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:53,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:48:53,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:53,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:53,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:53,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:53,993 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:48:53,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:48:54,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:48:54,190 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:48:54,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:48:55,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66551#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:48:55,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:48:55,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:48:55,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 67 [2022-11-19 07:48:55,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509938628] [2022-11-19 07:48:55,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:55,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-19 07:48:55,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:55,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-19 07:48:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=5076, Unknown=0, NotChecked=0, Total=6162 [2022-11-19 07:48:55,602 INFO L87 Difference]: Start difference. First operand 173 states and 178 transitions. Second operand has 67 states, 67 states have (on average 2.6417910447761193) internal successors, (177), 67 states have internal predecessors, (177), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-11-19 07:48:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:56,725 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2022-11-19 07:48:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-19 07:48:56,725 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.6417910447761193) internal successors, (177), 67 states have internal predecessors, (177), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 173 [2022-11-19 07:48:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:56,726 INFO L225 Difference]: With dead ends: 249 [2022-11-19 07:48:56,726 INFO L226 Difference]: Without dead ends: 183 [2022-11-19 07:48:56,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 443 SyntacticMatches, 41 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4113 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1796, Invalid=7906, Unknown=0, NotChecked=0, Total=9702 [2022-11-19 07:48:56,727 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 255 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:56,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 278 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:48:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-19 07:48:56,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 170. [2022-11-19 07:48:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 23 states have call successors, (23), 20 states have call predecessors, (23), 20 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-19 07:48:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2022-11-19 07:48:56,888 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 173 [2022-11-19 07:48:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:56,889 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2022-11-19 07:48:56,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.6417910447761193) internal successors, (177), 67 states have internal predecessors, (177), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-11-19 07:48:56,889 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2022-11-19 07:48:56,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-19 07:48:56,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:56,890 INFO L195 NwaCegarLoop]: trace histogram [23, 21, 21, 21, 21, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:56,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:57,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:57,099 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:57,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:57,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1070476356, now seen corresponding path program 60 times [2022-11-19 07:48:57,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:57,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489844673] [2022-11-19 07:48:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:57,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 21 proven. 1223 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-11-19 07:48:59,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:59,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489844673] [2022-11-19 07:48:59,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489844673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:59,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015632052] [2022-11-19 07:48:59,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:48:59,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:59,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:59,749 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:59,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-19 07:49:00,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:49:00,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:49:00,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-19 07:49:00,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:02,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:49:02,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:02,465 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 25 treesize of output 24 [2022-11-19 07:49:04,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:49:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 63 proven. 1223 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2022-11-19 07:49:04,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:04,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:49:04,737 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 31 treesize of output 27 [2022-11-19 07:49:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 21 proven. 1223 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-11-19 07:49:05,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015632052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:05,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524253174] [2022-11-19 07:49:05,247 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:49:05,247 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:49:05,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:49:05,248 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:49:05,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:49:05,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:05,318 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:49:05,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:49:05,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:05,361 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:49:05,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:49:05,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:05,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:49:05,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:05,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:05,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:05,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:05,826 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:49:05,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:49:05,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:49:06,021 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:49:06,022 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:49:08,162 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68361#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:49:08,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:49:08,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:49:08,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 51, 49] total 100 [2022-11-19 07:49:08,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117776155] [2022-11-19 07:49:08,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:49:08,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-19 07:49:08,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:08,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-19 07:49:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=11915, Unknown=0, NotChecked=0, Total=12432 [2022-11-19 07:49:08,164 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 100 states, 97 states have (on average 2.2783505154639174) internal successors, (221), 95 states have internal predecessors, (221), 45 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (46), 46 states have call predecessors, (46), 45 states have call successors, (46) [2022-11-19 07:49:12,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:12,647 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2022-11-19 07:49:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-19 07:49:12,648 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 97 states have (on average 2.2783505154639174) internal successors, (221), 95 states have internal predecessors, (221), 45 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (46), 46 states have call predecessors, (46), 45 states have call successors, (46) Word has length 175 [2022-11-19 07:49:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:12,649 INFO L225 Difference]: With dead ends: 180 [2022-11-19 07:49:12,649 INFO L226 Difference]: Without dead ends: 178 [2022-11-19 07:49:12,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 459 SyntacticMatches, 5 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5993 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=798, Invalid=18662, Unknown=0, NotChecked=0, Total=19460 [2022-11-19 07:49:12,651 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 264 mSDsluCounter, 2252 mSDsCounter, 0 mSdLazyCounter, 7151 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 2298 SdHoareTripleChecker+Invalid, 7341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 7151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:12,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 2298 Invalid, 7341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 7151 Invalid, 0 Unknown, 120 Unchecked, 3.4s Time] [2022-11-19 07:49:12,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-19 07:49:12,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2022-11-19 07:49:12,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-19 07:49:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-11-19 07:49:12,907 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 175 [2022-11-19 07:49:12,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:12,907 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-11-19 07:49:12,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 97 states have (on average 2.2783505154639174) internal successors, (221), 95 states have internal predecessors, (221), 45 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (46), 46 states have call predecessors, (46), 45 states have call successors, (46) [2022-11-19 07:49:12,908 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-11-19 07:49:12,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-19 07:49:12,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:12,909 INFO L195 NwaCegarLoop]: trace histogram [23, 21, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:49:12,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-19 07:49:13,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:13,117 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:13,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:13,117 INFO L85 PathProgramCache]: Analyzing trace with hash 434460228, now seen corresponding path program 61 times [2022-11-19 07:49:13,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:13,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998187652] [2022-11-19 07:49:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:13,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1767 backedges. 22 proven. 1281 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-11-19 07:49:15,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:15,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998187652] [2022-11-19 07:49:15,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998187652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:49:15,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638542609] [2022-11-19 07:49:15,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:49:15,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:15,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:49:15,263 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:49:15,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-19 07:49:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:15,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-19 07:49:15,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:17,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:49:19,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:49:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1767 backedges. 36 proven. 1285 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-11-19 07:49:19,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:19,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:49:19,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-19 07:49:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1767 backedges. 22 proven. 1281 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-11-19 07:49:20,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638542609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:20,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1018346324] [2022-11-19 07:49:20,204 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:49:20,204 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:49:20,204 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:49:20,204 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:49:20,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:49:20,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:20,262 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:49:20,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:49:20,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:20,299 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:49:20,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:49:20,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:20,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:49:20,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:20,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:20,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:20,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:20,782 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:49:20,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:49:20,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:49:20,970 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:49:20,972 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:49:23,090 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '70120#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:49:23,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:49:23,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:49:23,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 49] total 97 [2022-11-19 07:49:23,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306477471] [2022-11-19 07:49:23,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:49:23,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-19 07:49:23,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:23,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-19 07:49:23,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=11315, Unknown=0, NotChecked=0, Total=11772 [2022-11-19 07:49:23,093 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 97 states, 95 states have (on average 2.336842105263158) internal successors, (222), 93 states have internal predecessors, (222), 44 states have call successors, (45), 1 states have call predecessors, (45), 2 states have return successors, (45), 45 states have call predecessors, (45), 44 states have call successors, (45) [2022-11-19 07:49:29,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:29,771 INFO L93 Difference]: Finished difference Result 257 states and 263 transitions. [2022-11-19 07:49:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-19 07:49:29,771 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 95 states have (on average 2.336842105263158) internal successors, (222), 93 states have internal predecessors, (222), 44 states have call successors, (45), 1 states have call predecessors, (45), 2 states have return successors, (45), 45 states have call predecessors, (45), 44 states have call successors, (45) Word has length 178 [2022-11-19 07:49:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:29,772 INFO L225 Difference]: With dead ends: 257 [2022-11-19 07:49:29,772 INFO L226 Difference]: Without dead ends: 255 [2022-11-19 07:49:29,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 471 SyntacticMatches, 4 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8712 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1298, Invalid=29502, Unknown=0, NotChecked=0, Total=30800 [2022-11-19 07:49:29,774 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 596 mSDsluCounter, 2304 mSDsCounter, 0 mSdLazyCounter, 7225 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 2355 SdHoareTripleChecker+Invalid, 7397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 7225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:29,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 2355 Invalid, 7397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 7225 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-19 07:49:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-19 07:49:29,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 181. [2022-11-19 07:49:29,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 24 states have call successors, (24), 21 states have call predecessors, (24), 21 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-19 07:49:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 186 transitions. [2022-11-19 07:49:29,946 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 186 transitions. Word has length 178 [2022-11-19 07:49:29,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:29,947 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 186 transitions. [2022-11-19 07:49:29,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 95 states have (on average 2.336842105263158) internal successors, (222), 93 states have internal predecessors, (222), 44 states have call successors, (45), 1 states have call predecessors, (45), 2 states have return successors, (45), 45 states have call predecessors, (45), 44 states have call successors, (45) [2022-11-19 07:49:29,947 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 186 transitions. [2022-11-19 07:49:29,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-19 07:49:29,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:29,948 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:49:29,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-19 07:49:30,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:30,150 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:30,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:30,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2021266364, now seen corresponding path program 62 times [2022-11-19 07:49:30,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:30,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602579334] [2022-11-19 07:49:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:30,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 611 proven. 712 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-19 07:49:31,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:31,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602579334] [2022-11-19 07:49:31,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602579334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:49:31,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258502042] [2022-11-19 07:49:31,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:49:31,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:31,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:49:31,383 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:49:31,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-19 07:49:33,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-19 07:49:33,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:49:33,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-19 07:49:33,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 672 proven. 651 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-19 07:49:34,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 672 proven. 651 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-19 07:49:35,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258502042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:35,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [287289785] [2022-11-19 07:49:35,482 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:49:35,483 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:49:35,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:49:35,483 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:49:35,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:49:35,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:35,543 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:49:35,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:49:35,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:35,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:49:35,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:35,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:49:36,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:36,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:36,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:36,033 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:49:36,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:49:36,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:49:36,172 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:49:36,173 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:49:37,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '72058#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:49:37,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:49:37,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:49:37,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 70 [2022-11-19 07:49:37,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358854752] [2022-11-19 07:49:37,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:49:37,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-19 07:49:37,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:37,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-19 07:49:37,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=5463, Unknown=0, NotChecked=0, Total=6642 [2022-11-19 07:49:37,635 INFO L87 Difference]: Start difference. First operand 181 states and 186 transitions. Second operand has 70 states, 70 states have (on average 2.642857142857143) internal successors, (185), 70 states have internal predecessors, (185), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-11-19 07:49:38,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:38,796 INFO L93 Difference]: Finished difference Result 260 states and 266 transitions. [2022-11-19 07:49:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-19 07:49:38,796 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.642857142857143) internal successors, (185), 70 states have internal predecessors, (185), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 181 [2022-11-19 07:49:38,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:38,797 INFO L225 Difference]: With dead ends: 260 [2022-11-19 07:49:38,797 INFO L226 Difference]: Without dead ends: 191 [2022-11-19 07:49:38,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 464 SyntacticMatches, 43 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4451 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1956, Invalid=8550, Unknown=0, NotChecked=0, Total=10506 [2022-11-19 07:49:38,798 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 322 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:38,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 252 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:49:38,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-19 07:49:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 178. [2022-11-19 07:49:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 24 states have call successors, (24), 21 states have call predecessors, (24), 21 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-19 07:49:38,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2022-11-19 07:49:38,952 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 181 [2022-11-19 07:49:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:38,952 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2022-11-19 07:49:38,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.642857142857143) internal successors, (185), 70 states have internal predecessors, (185), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-11-19 07:49:38,953 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2022-11-19 07:49:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-19 07:49:38,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:38,954 INFO L195 NwaCegarLoop]: trace histogram [24, 22, 22, 22, 22, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:49:38,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-11-19 07:49:39,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:39,161 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:39,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:39,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1591350019, now seen corresponding path program 63 times [2022-11-19 07:49:39,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:39,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734291222] [2022-11-19 07:49:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:39,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1877 backedges. 22 proven. 1347 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-11-19 07:49:41,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:41,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734291222] [2022-11-19 07:49:41,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734291222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:49:41,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223124076] [2022-11-19 07:49:41,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:49:41,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:41,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:49:41,407 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:49:41,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-19 07:49:41,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:49:41,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:49:41,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-19 07:49:41,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:43,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:49:44,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:44,209 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 25 treesize of output 24 [2022-11-19 07:49:46,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:49:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1877 backedges. 66 proven. 1347 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-11-19 07:49:46,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:46,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:49:46,648 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 31 treesize of output 27 [2022-11-19 07:49:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1877 backedges. 22 proven. 1347 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-11-19 07:49:47,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223124076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:47,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [959587781] [2022-11-19 07:49:47,087 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:49:47,087 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:49:47,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:49:47,087 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:49:47,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:49:47,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:47,146 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:49:47,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:49:47,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:47,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:49:47,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:47,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:49:47,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:47,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:47,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:47,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:47,621 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:49:47,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:49:47,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:49:47,818 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:49:47,819 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:49:49,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73948#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:49:49,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:49:49,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:49:49,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 53, 51] total 102 [2022-11-19 07:49:49,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862130189] [2022-11-19 07:49:49,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:49:49,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-19 07:49:49,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:49,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-19 07:49:49,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=12355, Unknown=0, NotChecked=0, Total=12882 [2022-11-19 07:49:49,993 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 102 states, 100 states have (on average 2.29) internal successors, (229), 98 states have internal predecessors, (229), 46 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (47), 47 states have call predecessors, (47), 46 states have call successors, (47) [2022-11-19 07:49:54,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:54,316 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2022-11-19 07:49:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-19 07:49:54,317 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 100 states have (on average 2.29) internal successors, (229), 98 states have internal predecessors, (229), 46 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (47), 47 states have call predecessors, (47), 46 states have call successors, (47) Word has length 183 [2022-11-19 07:49:54,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:54,318 INFO L225 Difference]: With dead ends: 188 [2022-11-19 07:49:54,318 INFO L226 Difference]: Without dead ends: 186 [2022-11-19 07:49:54,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 480 SyntacticMatches, 6 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6267 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=818, Invalid=19488, Unknown=0, NotChecked=0, Total=20306 [2022-11-19 07:49:54,320 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 309 mSDsluCounter, 2107 mSDsCounter, 0 mSdLazyCounter, 6805 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 7006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 6805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:54,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 2155 Invalid, 7006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 6805 Invalid, 0 Unknown, 111 Unchecked, 3.2s Time] [2022-11-19 07:49:54,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-19 07:49:54,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2022-11-19 07:49:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 24 states have call successors, (24), 22 states have call predecessors, (24), 22 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-19 07:49:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2022-11-19 07:49:54,497 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 183 [2022-11-19 07:49:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:54,498 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2022-11-19 07:49:54,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 100 states have (on average 2.29) internal successors, (229), 98 states have internal predecessors, (229), 46 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (47), 47 states have call predecessors, (47), 46 states have call successors, (47) [2022-11-19 07:49:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2022-11-19 07:49:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-19 07:49:54,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:54,499 INFO L195 NwaCegarLoop]: trace histogram [24, 22, 22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:49:54,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-19 07:49:54,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-11-19 07:49:54,707 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:54,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:54,708 INFO L85 PathProgramCache]: Analyzing trace with hash 64914213, now seen corresponding path program 64 times [2022-11-19 07:49:54,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:54,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815456415] [2022-11-19 07:49:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:54,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 23 proven. 1408 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-11-19 07:49:57,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:57,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815456415] [2022-11-19 07:49:57,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815456415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:49:57,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191126566] [2022-11-19 07:49:57,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:49:57,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:57,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:49:57,255 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:49:57,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-19 07:49:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:57,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-19 07:49:57,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:59,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:50:01,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:50:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 29 proven. 1421 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2022-11-19 07:50:01,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:50:02,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:50:02,079 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 24 treesize of output 20 [2022-11-19 07:50:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 23 proven. 1408 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-11-19 07:50:02,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191126566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:50:02,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1292480860] [2022-11-19 07:50:02,564 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:50:02,565 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:50:02,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:50:02,565 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:50:02,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:50:02,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:02,642 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:50:02,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:50:02,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:02,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:50:02,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:02,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:50:03,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:03,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:03,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:03,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:03,135 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:50:03,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:50:03,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:50:03,333 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:50:03,334 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:50:05,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75784#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:50:05,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:50:05,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:50:05,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 52, 51] total 101 [2022-11-19 07:50:05,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456758889] [2022-11-19 07:50:05,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:50:05,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-19 07:50:05,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:50:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-19 07:50:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=12182, Unknown=0, NotChecked=0, Total=12656 [2022-11-19 07:50:05,517 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 101 states, 99 states have (on average 2.3434343434343434) internal successors, (232), 97 states have internal predecessors, (232), 46 states have call successors, (47), 1 states have call predecessors, (47), 2 states have return successors, (47), 47 states have call predecessors, (47), 46 states have call successors, (47) [2022-11-19 07:50:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:50:13,336 INFO L93 Difference]: Finished difference Result 268 states and 274 transitions. [2022-11-19 07:50:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-19 07:50:13,336 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 99 states have (on average 2.3434343434343434) internal successors, (232), 97 states have internal predecessors, (232), 46 states have call successors, (47), 1 states have call predecessors, (47), 2 states have return successors, (47), 47 states have call predecessors, (47), 46 states have call successors, (47) Word has length 186 [2022-11-19 07:50:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:50:13,338 INFO L225 Difference]: With dead ends: 268 [2022-11-19 07:50:13,338 INFO L226 Difference]: Without dead ends: 266 [2022-11-19 07:50:13,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 493 SyntacticMatches, 4 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9437 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1353, Invalid=31953, Unknown=0, NotChecked=0, Total=33306 [2022-11-19 07:50:13,339 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 609 mSDsluCounter, 3057 mSDsCounter, 0 mSdLazyCounter, 8930 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 3110 SdHoareTripleChecker+Invalid, 9087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 8930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:50:13,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 3110 Invalid, 9087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 8930 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-19 07:50:13,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-19 07:50:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 189. [2022-11-19 07:50:13,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-19 07:50:13,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 194 transitions. [2022-11-19 07:50:13,544 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 194 transitions. Word has length 186 [2022-11-19 07:50:13,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:50:13,544 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 194 transitions. [2022-11-19 07:50:13,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 99 states have (on average 2.3434343434343434) internal successors, (232), 97 states have internal predecessors, (232), 46 states have call successors, (47), 1 states have call predecessors, (47), 2 states have return successors, (47), 47 states have call predecessors, (47), 46 states have call successors, (47) [2022-11-19 07:50:13,544 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 194 transitions. [2022-11-19 07:50:13,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-11-19 07:50:13,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:50:13,546 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:50:13,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-11-19 07:50:13,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-11-19 07:50:13,753 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:50:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:50:13,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1129547715, now seen corresponding path program 65 times [2022-11-19 07:50:13,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:50:13,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475127382] [2022-11-19 07:50:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:50:13,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:50:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 673 proven. 779 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-11-19 07:50:15,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:50:15,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475127382] [2022-11-19 07:50:15,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475127382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:50:15,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549989080] [2022-11-19 07:50:15,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:50:15,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:50:15,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:50:15,087 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:50:15,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-19 07:50:18,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-19 07:50:18,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:50:18,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-19 07:50:18,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:50:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 737 proven. 715 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-11-19 07:50:19,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:50:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 737 proven. 715 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-11-19 07:50:20,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549989080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:50:20,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794145115] [2022-11-19 07:50:20,359 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:50:20,359 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:50:20,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:50:20,359 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:50:20,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:50:20,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:20,417 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:50:20,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:50:20,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:20,452 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:50:20,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:50:20,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:20,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:50:20,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:20,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:20,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:20,969 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:50:20,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:50:21,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:50:21,118 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:50:21,119 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:50:22,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '77807#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:50:22,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:50:22,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:50:22,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 73 [2022-11-19 07:50:22,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209225202] [2022-11-19 07:50:22,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:50:22,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-19 07:50:22,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:50:22,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-19 07:50:22,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1276, Invalid=5864, Unknown=0, NotChecked=0, Total=7140 [2022-11-19 07:50:22,596 INFO L87 Difference]: Start difference. First operand 189 states and 194 transitions. Second operand has 73 states, 73 states have (on average 2.643835616438356) internal successors, (193), 73 states have internal predecessors, (193), 24 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-19 07:50:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:50:23,875 INFO L93 Difference]: Finished difference Result 271 states and 277 transitions. [2022-11-19 07:50:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-19 07:50:23,875 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.643835616438356) internal successors, (193), 73 states have internal predecessors, (193), 24 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) Word has length 189 [2022-11-19 07:50:23,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:50:23,877 INFO L225 Difference]: With dead ends: 271 [2022-11-19 07:50:23,877 INFO L226 Difference]: Without dead ends: 199 [2022-11-19 07:50:23,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 485 SyntacticMatches, 45 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4802 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2123, Invalid=9219, Unknown=0, NotChecked=0, Total=11342 [2022-11-19 07:50:23,878 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 301 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:50:23,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 311 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:50:23,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-19 07:50:24,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2022-11-19 07:50:24,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-19 07:50:24,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2022-11-19 07:50:24,041 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 189 [2022-11-19 07:50:24,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:50:24,042 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2022-11-19 07:50:24,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.643835616438356) internal successors, (193), 73 states have internal predecessors, (193), 24 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-19 07:50:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2022-11-19 07:50:24,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-19 07:50:24,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:50:24,043 INFO L195 NwaCegarLoop]: trace histogram [25, 23, 23, 23, 23, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:50:24,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-11-19 07:50:24,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:50:24,243 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:50:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:50:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash -177860380, now seen corresponding path program 66 times [2022-11-19 07:50:24,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:50:24,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621151421] [2022-11-19 07:50:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:50:24,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:50:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 23 proven. 1477 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2022-11-19 07:50:26,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:50:26,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621151421] [2022-11-19 07:50:26,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621151421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:50:26,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176469633] [2022-11-19 07:50:26,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:50:26,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:50:26,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:50:26,666 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:50:26,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-19 07:50:27,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:50:27,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:50:27,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-19 07:50:27,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:50:29,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:50:29,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:29,672 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 25 treesize of output 24 [2022-11-19 07:50:31,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:50:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 69 proven. 1477 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-11-19 07:50:31,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:50:32,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:50:32,279 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 31 treesize of output 27 [2022-11-19 07:50:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 23 proven. 1477 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2022-11-19 07:50:32,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176469633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:50:32,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1116035581] [2022-11-19 07:50:32,743 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:50:32,743 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:50:32,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:50:32,743 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:50:32,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:50:32,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:32,801 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:50:32,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:50:32,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:32,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:50:32,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:32,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:50:33,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:33,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:33,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:33,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:33,288 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:50:33,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:50:33,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:50:33,464 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:50:33,465 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:50:35,689 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '79779#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:50:35,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:50:35,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:50:35,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 55, 53] total 106 [2022-11-19 07:50:35,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957887128] [2022-11-19 07:50:35,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:50:35,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-11-19 07:50:35,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:50:35,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-11-19 07:50:35,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=13258, Unknown=0, NotChecked=0, Total=13806 [2022-11-19 07:50:35,692 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand has 106 states, 104 states have (on average 2.2788461538461537) internal successors, (237), 102 states have internal predecessors, (237), 48 states have call successors, (49), 2 states have call predecessors, (49), 3 states have return successors, (49), 49 states have call predecessors, (49), 48 states have call successors, (49) [2022-11-19 07:50:40,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:50:40,835 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2022-11-19 07:50:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-19 07:50:40,836 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 104 states have (on average 2.2788461538461537) internal successors, (237), 102 states have internal predecessors, (237), 48 states have call successors, (49), 2 states have call predecessors, (49), 3 states have return successors, (49), 49 states have call predecessors, (49), 48 states have call successors, (49) Word has length 191 [2022-11-19 07:50:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:50:40,837 INFO L225 Difference]: With dead ends: 196 [2022-11-19 07:50:40,837 INFO L226 Difference]: Without dead ends: 194 [2022-11-19 07:50:40,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 502 SyntacticMatches, 6 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6607 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=837, Invalid=20625, Unknown=0, NotChecked=0, Total=21462 [2022-11-19 07:50:40,838 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 243 mSDsluCounter, 2941 mSDsCounter, 0 mSdLazyCounter, 8467 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2991 SdHoareTripleChecker+Invalid, 8697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 8467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:50:40,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 2991 Invalid, 8697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 8467 Invalid, 0 Unknown, 133 Unchecked, 4.0s Time] [2022-11-19 07:50:40,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-19 07:50:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2022-11-19 07:50:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 25 states have call successors, (25), 23 states have call predecessors, (25), 23 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-19 07:50:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 194 transitions. [2022-11-19 07:50:41,004 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 194 transitions. Word has length 191 [2022-11-19 07:50:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:50:41,005 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 194 transitions. [2022-11-19 07:50:41,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 104 states have (on average 2.2788461538461537) internal successors, (237), 102 states have internal predecessors, (237), 48 states have call successors, (49), 2 states have call predecessors, (49), 3 states have return successors, (49), 49 states have call predecessors, (49), 48 states have call successors, (49) [2022-11-19 07:50:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 194 transitions. [2022-11-19 07:50:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-19 07:50:41,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:50:41,007 INFO L195 NwaCegarLoop]: trace histogram [25, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:50:41,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-19 07:50:41,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-19 07:50:41,210 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:50:41,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:50:41,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1356574116, now seen corresponding path program 67 times [2022-11-19 07:50:41,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:50:41,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022299040] [2022-11-19 07:50:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:50:41,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:50:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 24 proven. 1541 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2022-11-19 07:50:43,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:50:43,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022299040] [2022-11-19 07:50:43,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022299040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:50:43,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438853812] [2022-11-19 07:50:43,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:50:43,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:50:43,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:50:43,709 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:50:43,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-19 07:50:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:44,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-19 07:50:44,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:50:46,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:50:48,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:50:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 39 proven. 1546 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-11-19 07:50:48,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:50:48,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:50:48,886 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 24 treesize of output 20 [2022-11-19 07:50:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 24 proven. 1541 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2022-11-19 07:50:49,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438853812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:50:49,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2123389103] [2022-11-19 07:50:49,384 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:50:49,384 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:50:49,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:50:49,384 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:50:49,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:50:49,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:49,441 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 07:50:49,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 07:50:49,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:49,477 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:50:49,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:50:49,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:49,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:50:49,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:49,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:49,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:49,917 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:50:49,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:50:50,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:50:50,104 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:50:50,105 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:50:52,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '81691#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:50:52,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:50:52,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:50:52,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 53] total 105 [2022-11-19 07:50:52,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410972100] [2022-11-19 07:50:52,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:50:52,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-19 07:50:52,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:50:52,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-19 07:50:52,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=13081, Unknown=0, NotChecked=0, Total=13572 [2022-11-19 07:50:52,354 INFO L87 Difference]: Start difference. First operand 191 states and 194 transitions. Second operand has 105 states, 103 states have (on average 2.349514563106796) internal successors, (242), 101 states have internal predecessors, (242), 48 states have call successors, (49), 1 states have call predecessors, (49), 2 states have return successors, (49), 49 states have call predecessors, (49), 48 states have call successors, (49) [2022-11-19 07:51:00,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:00,778 INFO L93 Difference]: Finished difference Result 279 states and 285 transitions. [2022-11-19 07:51:00,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-19 07:51:00,779 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 103 states have (on average 2.349514563106796) internal successors, (242), 101 states have internal predecessors, (242), 48 states have call successors, (49), 1 states have call predecessors, (49), 2 states have return successors, (49), 49 states have call predecessors, (49), 48 states have call successors, (49) Word has length 194 [2022-11-19 07:51:00,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:00,780 INFO L225 Difference]: With dead ends: 279 [2022-11-19 07:51:00,780 INFO L226 Difference]: Without dead ends: 277 [2022-11-19 07:51:00,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 515 SyntacticMatches, 4 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10191 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1408, Invalid=34502, Unknown=0, NotChecked=0, Total=35910 [2022-11-19 07:51:00,782 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 664 mSDsluCounter, 3258 mSDsCounter, 0 mSdLazyCounter, 9920 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 3313 SdHoareTripleChecker+Invalid, 10106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 9920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:00,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 3313 Invalid, 10106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 9920 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-19 07:51:00,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-19 07:51:00,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 197. [2022-11-19 07:51:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 26 states have call successors, (26), 23 states have call predecessors, (26), 23 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-19 07:51:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 202 transitions. [2022-11-19 07:51:00,991 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 202 transitions. Word has length 194 [2022-11-19 07:51:00,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:00,992 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 202 transitions. [2022-11-19 07:51:00,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 103 states have (on average 2.349514563106796) internal successors, (242), 101 states have internal predecessors, (242), 48 states have call successors, (49), 1 states have call predecessors, (49), 2 states have return successors, (49), 49 states have call predecessors, (49), 48 states have call successors, (49) [2022-11-19 07:51:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 202 transitions. [2022-11-19 07:51:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-11-19 07:51:00,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:00,993 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:01,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:01,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:01,195 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:01,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:01,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1937254172, now seen corresponding path program 68 times [2022-11-19 07:51:01,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:01,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177160363] [2022-11-19 07:51:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:01,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 738 proven. 849 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-11-19 07:51:02,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:02,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177160363] [2022-11-19 07:51:02,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177160363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:51:02,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056589332] [2022-11-19 07:51:02,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:51:02,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:02,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:51:02,622 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:51:02,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-19 07:51:06,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-11-19 07:51:06,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:51:06,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 07:51:06,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 805 proven. 782 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-11-19 07:51:07,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 805 proven. 782 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-11-19 07:51:08,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056589332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:08,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [833712493] [2022-11-19 07:51:08,609 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:51:08,609 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:51:08,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:51:08,609 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:51:08,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:51:08,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:08,665 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:51:08,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:51:08,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:08,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:51:08,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:08,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:51:09,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:09,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:09,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:09,151 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:51:09,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:51:09,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:51:09,293 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:51:09,294 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:51:10,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83799#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:51:10,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:51:10,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:51:10,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 76 [2022-11-19 07:51:10,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830750145] [2022-11-19 07:51:10,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:51:10,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-19 07:51:10,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:10,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-19 07:51:10,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1377, Invalid=6279, Unknown=0, NotChecked=0, Total=7656 [2022-11-19 07:51:10,816 INFO L87 Difference]: Start difference. First operand 197 states and 202 transitions. Second operand has 76 states, 76 states have (on average 2.6447368421052633) internal successors, (201), 76 states have internal predecessors, (201), 25 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-11-19 07:51:12,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:12,203 INFO L93 Difference]: Finished difference Result 282 states and 288 transitions. [2022-11-19 07:51:12,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-19 07:51:12,203 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.6447368421052633) internal successors, (201), 76 states have internal predecessors, (201), 25 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) Word has length 197 [2022-11-19 07:51:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:12,205 INFO L225 Difference]: With dead ends: 282 [2022-11-19 07:51:12,205 INFO L226 Difference]: Without dead ends: 207 [2022-11-19 07:51:12,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 506 SyntacticMatches, 47 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5166 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2297, Invalid=9913, Unknown=0, NotChecked=0, Total=12210 [2022-11-19 07:51:12,206 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 344 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:12,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 320 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:51:12,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-19 07:51:12,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 194. [2022-11-19 07:51:12,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 26 states have call successors, (26), 23 states have call predecessors, (26), 23 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-19 07:51:12,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2022-11-19 07:51:12,419 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 197 [2022-11-19 07:51:12,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:12,419 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2022-11-19 07:51:12,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.6447368421052633) internal successors, (201), 76 states have internal predecessors, (201), 25 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-11-19 07:51:12,420 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2022-11-19 07:51:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-19 07:51:12,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:12,423 INFO L195 NwaCegarLoop]: trace histogram [26, 24, 24, 24, 24, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:12,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:12,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:12,634 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:12,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:12,634 INFO L85 PathProgramCache]: Analyzing trace with hash 462752867, now seen corresponding path program 69 times [2022-11-19 07:51:12,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:12,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80594059] [2022-11-19 07:51:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:12,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2239 backedges. 24 proven. 1613 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-11-19 07:51:15,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:15,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80594059] [2022-11-19 07:51:15,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80594059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:51:15,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790558192] [2022-11-19 07:51:15,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:51:15,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:15,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:51:15,264 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:51:15,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-19 07:51:16,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:51:16,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:51:16,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-19 07:51:16,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:18,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:51:18,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:18,633 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 25 treesize of output 24 [2022-11-19 07:51:20,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:51:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2239 backedges. 72 proven. 1613 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2022-11-19 07:51:21,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:21,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:51:21,436 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 31 treesize of output 27 [2022-11-19 07:51:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2239 backedges. 24 proven. 1613 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-11-19 07:51:21,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790558192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:21,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1672368019] [2022-11-19 07:51:21,918 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:51:21,918 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:51:21,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:51:21,918 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:51:21,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:51:21,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:21,979 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:51:21,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:51:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:21,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:51:22,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:22,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:51:22,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:22,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:22,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:22,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:22,483 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:51:22,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:51:22,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:51:22,652 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:51:22,653 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:51:24,939 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '85853#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:51:24,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:51:24,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:51:24,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 57, 55] total 110 [2022-11-19 07:51:24,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803666239] [2022-11-19 07:51:24,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:51:24,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-19 07:51:24,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:24,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-19 07:51:24,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=14197, Unknown=0, NotChecked=0, Total=14762 [2022-11-19 07:51:24,941 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand has 110 states, 108 states have (on average 2.3055555555555554) internal successors, (249), 106 states have internal predecessors, (249), 50 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (51), 51 states have call predecessors, (51), 50 states have call successors, (51) [2022-11-19 07:51:31,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:31,611 INFO L93 Difference]: Finished difference Result 350 states and 359 transitions. [2022-11-19 07:51:31,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-11-19 07:51:31,613 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 108 states have (on average 2.3055555555555554) internal successors, (249), 106 states have internal predecessors, (249), 50 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (51), 51 states have call predecessors, (51), 50 states have call successors, (51) Word has length 199 [2022-11-19 07:51:31,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:31,614 INFO L225 Difference]: With dead ends: 350 [2022-11-19 07:51:31,614 INFO L226 Difference]: Without dead ends: 348 [2022-11-19 07:51:31,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 526 SyntacticMatches, 6 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10204 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1058, Invalid=30094, Unknown=0, NotChecked=0, Total=31152 [2022-11-19 07:51:31,616 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 358 mSDsluCounter, 2868 mSDsCounter, 0 mSdLazyCounter, 8500 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 2920 SdHoareTripleChecker+Invalid, 8809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 8500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:31,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 2920 Invalid, 8809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 8500 Invalid, 0 Unknown, 188 Unchecked, 4.3s Time] [2022-11-19 07:51:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-11-19 07:51:31,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 205. [2022-11-19 07:51:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 152 states have (on average 1.0263157894736843) internal successors, (156), 152 states have internal predecessors, (156), 28 states have call successors, (28), 24 states have call predecessors, (28), 24 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-19 07:51:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 212 transitions. [2022-11-19 07:51:31,837 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 212 transitions. Word has length 199 [2022-11-19 07:51:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:31,837 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 212 transitions. [2022-11-19 07:51:31,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 108 states have (on average 2.3055555555555554) internal successors, (249), 106 states have internal predecessors, (249), 50 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (51), 51 states have call predecessors, (51), 50 states have call successors, (51) [2022-11-19 07:51:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 212 transitions. [2022-11-19 07:51:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-19 07:51:31,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:31,839 INFO L195 NwaCegarLoop]: trace histogram [26, 24, 24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:31,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:32,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-11-19 07:51:32,054 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:32,054 INFO L85 PathProgramCache]: Analyzing trace with hash -968847931, now seen corresponding path program 70 times [2022-11-19 07:51:32,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:32,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503728158] [2022-11-19 07:51:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:32,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 25 proven. 1680 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-11-19 07:51:35,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:35,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503728158] [2022-11-19 07:51:35,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503728158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:51:35,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951459554] [2022-11-19 07:51:35,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:51:35,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:35,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:51:35,176 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:51:35,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-19 07:51:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:35,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-19 07:51:35,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:38,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:51:40,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:51:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 25 proven. 1701 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2022-11-19 07:51:40,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:41,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:51:41,024 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 24 treesize of output 20 [2022-11-19 07:51:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 25 proven. 1680 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-11-19 07:51:43,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951459554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:43,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [612922495] [2022-11-19 07:51:43,610 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:51:43,610 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:51:43,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:51:43,610 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:51:43,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:51:43,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:43,670 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:51:43,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:51:43,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:43,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:51:43,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:43,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:51:44,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:44,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:44,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:44,168 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:51:44,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:51:44,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:51:44,320 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:51:44,321 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:51:47,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '88128#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:51:47,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:51:47,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:51:47,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 56, 55] total 135 [2022-11-19 07:51:47,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901012067] [2022-11-19 07:51:47,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:51:47,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-11-19 07:51:47,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-11-19 07:51:47,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=20771, Unknown=0, NotChecked=0, Total=21462 [2022-11-19 07:51:47,102 INFO L87 Difference]: Start difference. First operand 205 states and 212 transitions. Second operand has 135 states, 133 states have (on average 2.263157894736842) internal successors, (301), 129 states have internal predecessors, (301), 74 states have call successors, (75), 1 states have call predecessors, (75), 2 states have return successors, (76), 76 states have call predecessors, (76), 74 states have call successors, (76) [2022-11-19 07:51:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:57,838 INFO L93 Difference]: Finished difference Result 361 states and 368 transitions. [2022-11-19 07:51:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-19 07:51:57,838 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 133 states have (on average 2.263157894736842) internal successors, (301), 129 states have internal predecessors, (301), 74 states have call successors, (75), 1 states have call predecessors, (75), 2 states have return successors, (76), 76 states have call predecessors, (76), 74 states have call successors, (76) Word has length 202 [2022-11-19 07:51:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:57,840 INFO L225 Difference]: With dead ends: 361 [2022-11-19 07:51:57,840 INFO L226 Difference]: Without dead ends: 359 [2022-11-19 07:51:57,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 514 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13781 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=1794, Invalid=47712, Unknown=0, NotChecked=0, Total=49506 [2022-11-19 07:51:57,843 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 603 mSDsluCounter, 4052 mSDsCounter, 0 mSdLazyCounter, 10546 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 4111 SdHoareTripleChecker+Invalid, 10719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 10546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:57,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 4111 Invalid, 10719 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [173 Valid, 10546 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-19 07:51:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-19 07:51:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 208. [2022-11-19 07:51:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 28 states have call successors, (28), 24 states have call predecessors, (28), 24 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-19 07:51:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 215 transitions. [2022-11-19 07:51:58,143 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 215 transitions. Word has length 202 [2022-11-19 07:51:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:58,144 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 215 transitions. [2022-11-19 07:51:58,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 133 states have (on average 2.263157894736842) internal successors, (301), 129 states have internal predecessors, (301), 74 states have call successors, (75), 1 states have call predecessors, (75), 2 states have return successors, (76), 76 states have call predecessors, (76), 74 states have call successors, (76) [2022-11-19 07:51:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 215 transitions. [2022-11-19 07:51:58,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-19 07:51:58,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:58,145 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:58,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:58,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:58,345 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:58,346 INFO L85 PathProgramCache]: Analyzing trace with hash -762971869, now seen corresponding path program 71 times [2022-11-19 07:51:58,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:58,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460101492] [2022-11-19 07:51:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:58,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2378 backedges. 806 proven. 922 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-11-19 07:51:59,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:59,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460101492] [2022-11-19 07:51:59,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460101492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:51:59,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192946343] [2022-11-19 07:51:59,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:51:59,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:59,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:51:59,982 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:51:59,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-19 07:52:03,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-19 07:52:03,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:52:03,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-19 07:52:03,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2378 backedges. 876 proven. 852 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-11-19 07:52:04,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:52:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2378 backedges. 876 proven. 852 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-11-19 07:52:06,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192946343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:52:06,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651722461] [2022-11-19 07:52:06,119 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:52:06,119 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:52:06,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:52:06,119 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:52:06,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:52:06,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:06,177 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:52:06,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:52:06,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:06,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:52:06,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:06,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:52:06,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:06,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:06,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:06,659 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:52:06,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:52:06,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:52:06,830 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:52:06,831 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:52:08,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '90421#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:52:08,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:52:08,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:52:08,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 79 [2022-11-19 07:52:08,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842584571] [2022-11-19 07:52:08,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:52:08,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-11-19 07:52:08,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:08,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-11-19 07:52:08,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1482, Invalid=6708, Unknown=0, NotChecked=0, Total=8190 [2022-11-19 07:52:08,363 INFO L87 Difference]: Start difference. First operand 208 states and 215 transitions. Second operand has 79 states, 79 states have (on average 2.6455696202531644) internal successors, (209), 79 states have internal predecessors, (209), 26 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-11-19 07:52:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:09,921 INFO L93 Difference]: Finished difference Result 364 states and 371 transitions. [2022-11-19 07:52:09,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-19 07:52:09,922 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.6455696202531644) internal successors, (209), 79 states have internal predecessors, (209), 26 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) Word has length 205 [2022-11-19 07:52:09,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:09,923 INFO L225 Difference]: With dead ends: 364 [2022-11-19 07:52:09,923 INFO L226 Difference]: Without dead ends: 286 [2022-11-19 07:52:09,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 527 SyntacticMatches, 49 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5543 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2478, Invalid=10632, Unknown=0, NotChecked=0, Total=13110 [2022-11-19 07:52:09,924 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 259 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:09,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 329 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:52:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-11-19 07:52:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 205. [2022-11-19 07:52:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 28 states have call successors, (28), 24 states have call predecessors, (28), 24 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-19 07:52:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 211 transitions. [2022-11-19 07:52:10,154 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 211 transitions. Word has length 205 [2022-11-19 07:52:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:10,154 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 211 transitions. [2022-11-19 07:52:10,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.6455696202531644) internal successors, (209), 79 states have internal predecessors, (209), 26 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-11-19 07:52:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 211 transitions. [2022-11-19 07:52:10,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-19 07:52:10,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:10,155 INFO L195 NwaCegarLoop]: trace histogram [27, 25, 25, 25, 25, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:10,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-19 07:52:10,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:10,356 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:10,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:10,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2016756348, now seen corresponding path program 72 times [2022-11-19 07:52:10,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:10,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421367775] [2022-11-19 07:52:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:10,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 25 proven. 1755 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-11-19 07:52:13,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:13,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421367775] [2022-11-19 07:52:13,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421367775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:52:13,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666816592] [2022-11-19 07:52:13,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:52:13,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:13,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:52:13,229 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:52:13,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-19 07:52:14,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:52:14,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:52:14,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-19 07:52:14,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:16,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:52:16,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:16,875 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 25 treesize of output 24 [2022-11-19 07:52:19,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:52:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 75 proven. 1755 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-11-19 07:52:19,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:52:19,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-11-19 07:52:19,859 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 31 treesize of output 27 [2022-11-19 07:52:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 25 proven. 1755 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-11-19 07:52:20,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666816592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:52:20,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [191879064] [2022-11-19 07:52:20,353 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:52:20,353 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:52:20,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:52:20,354 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:52:20,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:52:20,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:20,410 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:52:20,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:52:20,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:20,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:52:20,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:20,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-11-19 07:52:20,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:20,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:20,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:20,887 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-19 07:52:20,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 330 [2022-11-19 07:52:20,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:52:21,043 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:52:21,044 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:52:23,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '92657#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:52:23,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:52:23,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:52:23,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 59, 57] total 114 [2022-11-19 07:52:23,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863144924] [2022-11-19 07:52:23,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:52:23,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-11-19 07:52:23,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:23,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-11-19 07:52:23,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=15164, Unknown=0, NotChecked=0, Total=15750 [2022-11-19 07:52:23,442 INFO L87 Difference]: Start difference. First operand 205 states and 211 transitions. Second operand has 114 states, 112 states have (on average 2.294642857142857) internal successors, (257), 110 states have internal predecessors, (257), 52 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (53), 53 states have call predecessors, (53), 52 states have call successors, (53) [2022-11-19 07:52:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:29,503 INFO L93 Difference]: Finished difference Result 284 states and 289 transitions. [2022-11-19 07:52:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-19 07:52:29,504 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 112 states have (on average 2.294642857142857) internal successors, (257), 110 states have internal predecessors, (257), 52 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (53), 53 states have call predecessors, (53), 52 states have call successors, (53) Word has length 207 [2022-11-19 07:52:29,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:29,505 INFO L225 Difference]: With dead ends: 284 [2022-11-19 07:52:29,505 INFO L226 Difference]: Without dead ends: 282 [2022-11-19 07:52:29,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 546 SyntacticMatches, 6 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7647 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=905, Invalid=23901, Unknown=0, NotChecked=0, Total=24806 [2022-11-19 07:52:29,507 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 399 mSDsluCounter, 3501 mSDsCounter, 0 mSdLazyCounter, 9504 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 9745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 9504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:29,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 3557 Invalid, 9745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 9504 Invalid, 0 Unknown, 138 Unchecked, 4.5s Time] [2022-11-19 07:52:29,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-19 07:52:29,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 278. [2022-11-19 07:52:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 224 states have (on average 1.0178571428571428) internal successors, (228), 224 states have internal predecessors, (228), 28 states have call successors, (28), 25 states have call predecessors, (28), 25 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-19 07:52:29,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 284 transitions. [2022-11-19 07:52:29,881 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 284 transitions. Word has length 207 [2022-11-19 07:52:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:29,882 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 284 transitions. [2022-11-19 07:52:29,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 112 states have (on average 2.294642857142857) internal successors, (257), 110 states have internal predecessors, (257), 52 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (53), 53 states have call predecessors, (53), 52 states have call successors, (53) [2022-11-19 07:52:29,882 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 284 transitions. [2022-11-19 07:52:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-19 07:52:29,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:29,883 INFO L195 NwaCegarLoop]: trace histogram [28, 26, 26, 26, 26, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:29,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-11-19 07:52:30,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:30,083 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:30,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1370573059, now seen corresponding path program 73 times [2022-11-19 07:52:30,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:30,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933697781] [2022-11-19 07:52:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:30,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 27 proven. 1763 refuted. 0 times theorem prover too weak. 704 trivial. 0 not checked. [2022-11-19 07:52:33,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:33,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933697781] [2022-11-19 07:52:33,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933697781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:52:33,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093978803] [2022-11-19 07:52:33,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:52:33,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:33,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:52:33,347 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:52:33,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-11-19 07:52:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:33,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-19 07:52:33,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:36,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:52:36,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:36,399 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 25 treesize of output 24 [2022-11-19 07:52:36,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:36,665 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 25 treesize of output 24 [2022-11-19 07:52:36,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:36,931 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 25 treesize of output 24 [2022-11-19 07:52:39,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-19 07:52:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 181 proven. 1773 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2022-11-19 07:52:39,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:52:39,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093978803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:52:39,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1229506239] [2022-11-19 07:52:39,635 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:52:39,635 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:52:39,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:52:39,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:52:39,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:52:39,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:39,693 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:52:39,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:52:39,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:39,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:52:39,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:39,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:52:40,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:40,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:40,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:40,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:40,181 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:52:40,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 344 treesize of output 330 [2022-11-19 07:52:40,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:52:40,360 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:52:40,361 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:52:42,717 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '94505#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (= (ite (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem9#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:52:42,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:52:42,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:52:42,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 58] total 111 [2022-11-19 07:52:42,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567586956] [2022-11-19 07:52:42,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:52:42,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-11-19 07:52:42,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:42,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-11-19 07:52:42,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=587, Invalid=14913, Unknown=0, NotChecked=0, Total=15500 [2022-11-19 07:52:42,720 INFO L87 Difference]: Start difference. First operand 278 states and 284 transitions. Second operand has 111 states, 109 states have (on average 2.302752293577982) internal successors, (251), 107 states have internal predecessors, (251), 54 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (55), 55 states have call predecessors, (55), 54 states have call successors, (55) [2022-11-19 07:52:51,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:51,402 INFO L93 Difference]: Finished difference Result 286 states and 291 transitions. [2022-11-19 07:52:51,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-19 07:52:51,403 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 109 states have (on average 2.302752293577982) internal successors, (251), 107 states have internal predecessors, (251), 54 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (55), 55 states have call predecessors, (55), 54 states have call successors, (55) Word has length 209 [2022-11-19 07:52:51,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:51,404 INFO L225 Difference]: With dead ends: 286 [2022-11-19 07:52:51,404 INFO L226 Difference]: Without dead ends: 284 [2022-11-19 07:52:51,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 417 SyntacticMatches, 9 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9573 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1394, Invalid=30468, Unknown=0, NotChecked=0, Total=31862 [2022-11-19 07:52:51,405 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 366 mSDsluCounter, 3985 mSDsCounter, 0 mSdLazyCounter, 10224 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 4044 SdHoareTripleChecker+Invalid, 10438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 10224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:51,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 4044 Invalid, 10438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 10224 Invalid, 0 Unknown, 76 Unchecked, 4.9s Time] [2022-11-19 07:52:51,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-19 07:52:51,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 207. [2022-11-19 07:52:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 27 states have call successors, (27), 25 states have call predecessors, (27), 25 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-19 07:52:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2022-11-19 07:52:51,630 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 209 [2022-11-19 07:52:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:51,631 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2022-11-19 07:52:51,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 109 states have (on average 2.302752293577982) internal successors, (251), 107 states have internal predecessors, (251), 54 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (55), 55 states have call predecessors, (55), 54 states have call successors, (55) [2022-11-19 07:52:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2022-11-19 07:52:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-19 07:52:51,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:51,632 INFO L195 NwaCegarLoop]: trace histogram [27, 25, 25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:51,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-11-19 07:52:51,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:51,833 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1114651908, now seen corresponding path program 74 times [2022-11-19 07:52:51,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:51,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157828987] [2022-11-19 07:52:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:51,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2503 backedges. 26 proven. 1825 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-11-19 07:52:54,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:54,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157828987] [2022-11-19 07:52:54,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157828987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:52:54,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392263191] [2022-11-19 07:52:54,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:52:54,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:54,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:52:54,959 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:52:54,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0f30e60-e7b0-45df-a711-af785a49a38a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-19 07:53:01,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-11-19 07:53:01,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:53:01,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-19 07:53:01,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:01,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 07:53:05,123 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 07:53:05,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2022-11-19 07:53:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2503 backedges. 43 proven. 1830 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-11-19 07:53:05,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:53:07,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-11-19 07:53:07,817 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 24 treesize of output 20