./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a8f602fe3f26a1a48cfc4520a058a139a989329a9c65c27b1560937231a92c27 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 19:40:46,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:40:46,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:40:46,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:40:46,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:40:46,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:40:46,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:40:46,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:40:46,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:40:46,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:40:46,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:40:46,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:40:46,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:40:46,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:40:46,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:40:46,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:40:46,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:40:46,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:40:46,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:40:46,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:40:46,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:40:46,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:40:46,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:40:46,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:40:46,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:40:46,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:40:46,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:40:46,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:40:46,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:40:46,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:40:46,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:40:46,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:40:46,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:40:46,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:40:46,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:40:46,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:40:46,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:40:46,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:40:46,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:40:46,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:40:46,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:40:46,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:40:46,406 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:40:46,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:40:46,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:40:46,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:40:46,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:40:46,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:40:46,411 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:40:46,411 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:40:46,411 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:40:46,411 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:40:46,412 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:40:46,412 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:40:46,412 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:40:46,413 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:40:46,413 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:40:46,413 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:40:46,413 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:40:46,413 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:40:46,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:40:46,414 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:40:46,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:40:46,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:40:46,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:40:46,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:40:46,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:40:46,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:40:46,417 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:40:46,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:40:46,417 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:40:46,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:40:46,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:40:46,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:40:46,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:40:46,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:40:46,419 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:40:46,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:40:46,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:40:46,419 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:40:46,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:40:46,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:40:46,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:40:46,421 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_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8f602fe3f26a1a48cfc4520a058a139a989329a9c65c27b1560937231a92c27 [2022-11-16 19:40:46,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:40:46,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:40:46,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:40:46,790 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:40:46,792 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:40:46,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-programs/partial_mod_count_3.c [2022-11-16 19:40:46,866 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/data/435113926/806ba283969049f090d5d06c9dd357b3/FLAG851f4d4ca [2022-11-16 19:40:47,318 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:40:47,318 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/sv-benchmarks/c/array-programs/partial_mod_count_3.c [2022-11-16 19:40:47,323 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/data/435113926/806ba283969049f090d5d06c9dd357b3/FLAG851f4d4ca [2022-11-16 19:40:47,724 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/data/435113926/806ba283969049f090d5d06c9dd357b3 [2022-11-16 19:40:47,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:40:47,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:40:47,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:40:47,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:40:47,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:40:47,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:40:47" (1/1) ... [2022-11-16 19:40:47,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2170f414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:40:47, skipping insertion in model container [2022-11-16 19:40:47,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:40:47" (1/1) ... [2022-11-16 19:40:47,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:40:47,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:40:47,921 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/sv-benchmarks/c/array-programs/partial_mod_count_3.c[323,336] [2022-11-16 19:40:47,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:40:47,944 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:40:47,955 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/sv-benchmarks/c/array-programs/partial_mod_count_3.c[323,336] [2022-11-16 19:40:47,961 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:40:47,974 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:40:47,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:40:47 WrapperNode [2022-11-16 19:40:47,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:40:47,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:40:47,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:40:47,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:40:47,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:40:47" (1/1) ... [2022-11-16 19:40:47,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:40:47" (1/1) ... [2022-11-16 19:40:48,005 INFO L138 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2022-11-16 19:40:48,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:40:48,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:40:48,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:40:48,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:40:48,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:40:47" (1/1) ... [2022-11-16 19:40:48,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:40:47" (1/1) ... [2022-11-16 19:40:48,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:40:47" (1/1) ... [2022-11-16 19:40:48,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:40:47" (1/1) ... [2022-11-16 19:40:48,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:40:47" (1/1) ... [2022-11-16 19:40:48,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:40:47" (1/1) ... [2022-11-16 19:40:48,028 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:40:47" (1/1) ... [2022-11-16 19:40:48,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:40:47" (1/1) ... [2022-11-16 19:40:48,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:40:48,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:40:48,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:40:48,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:40:48,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:40:47" (1/1) ... [2022-11-16 19:40:48,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:40:48,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:40:48,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:40:48,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:40:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:40:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:40:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 19:40:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 19:40:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:40:48,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:40:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 19:40:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:40:48,158 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:40:48,159 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:40:48,333 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:40:48,390 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:40:48,390 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 19:40:48,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:40:48 BoogieIcfgContainer [2022-11-16 19:40:48,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:40:48,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:40:48,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:40:48,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:40:48,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:40:47" (1/3) ... [2022-11-16 19:40:48,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@311975c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:40:48, skipping insertion in model container [2022-11-16 19:40:48,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:40:47" (2/3) ... [2022-11-16 19:40:48,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@311975c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:40:48, skipping insertion in model container [2022-11-16 19:40:48,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:40:48" (3/3) ... [2022-11-16 19:40:48,401 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_3.c [2022-11-16 19:40:48,420 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:40:48,434 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:40:48,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:40:48,552 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;@3a57c757, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:40:48,552 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:40:48,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:40:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 19:40:48,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:40:48,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 19:40:48,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:40:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:40:48,582 INFO L85 PathProgramCache]: Analyzing trace with hash 83296886, now seen corresponding path program 1 times [2022-11-16 19:40:48,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:40:48,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020714685] [2022-11-16 19:40:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:40:48,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:40:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:40:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:40:48,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:40:48,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020714685] [2022-11-16 19:40:48,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020714685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:40:48,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:40:48,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:40:48,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060329399] [2022-11-16 19:40:48,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:40:48,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:40:48,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:40:48,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:40:48,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:40:48,858 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:40:48,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:40:48,918 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2022-11-16 19:40:48,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:40:48,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 19:40:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:40:48,929 INFO L225 Difference]: With dead ends: 15 [2022-11-16 19:40:48,931 INFO L226 Difference]: Without dead ends: 8 [2022-11-16 19:40:48,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:40:48,948 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:40:48,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:40:48,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-16 19:40:48,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-16 19:40:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:40:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-16 19:40:48,987 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-11-16 19:40:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:40:48,987 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-16 19:40:48,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:40:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-16 19:40:48,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 19:40:48,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:40:48,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 19:40:48,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:40:48,989 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:40:48,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:40:48,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1709852021, now seen corresponding path program 1 times [2022-11-16 19:40:48,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:40:48,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865511260] [2022-11-16 19:40:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:40:48,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:40:49,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:40:49,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363019055] [2022-11-16 19:40:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:40:49,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:40:49,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:40:49,013 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:40:49,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:40:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:40:49,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:40:49,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:40:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:40:49,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:40:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:40:49,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:40:49,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865511260] [2022-11-16 19:40:49,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:40:49,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363019055] [2022-11-16 19:40:49,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363019055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:40:49,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [253744928] [2022-11-16 19:40:49,305 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-16 19:40:49,305 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:40:49,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:40:49,315 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:40:49,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:40:49,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:49,429 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-16 19:40:49,431 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 24 treesize of output 40 [2022-11-16 19:40:49,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:49,511 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:40:49,513 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 [2022-11-16 19:40:49,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:49,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:49,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-16 19:40:49,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:49,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:49,662 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 66 treesize of output 55 [2022-11-16 19:40:49,676 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 30 treesize of output 28 [2022-11-16 19:40:49,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-16 19:40:49,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 19:40:49,881 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:40:50,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [253744928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:40:50,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:40:50,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2022-11-16 19:40:50,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665276895] [2022-11-16 19:40:50,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:40:50,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:40:50,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:40:50,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:40:50,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 19:40:50,115 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:40:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:40:50,156 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2022-11-16 19:40:50,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:40:50,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 19:40:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:40:50,158 INFO L225 Difference]: With dead ends: 13 [2022-11-16 19:40:50,158 INFO L226 Difference]: Without dead ends: 11 [2022-11-16 19:40:50,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 19:40:50,160 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:40:50,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:40:50,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-16 19:40:50,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2022-11-16 19:40:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:40:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-16 19:40:50,164 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-11-16 19:40:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:40:50,165 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-16 19:40:50,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:40:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-16 19:40:50,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:40:50,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:40:50,166 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:40:50,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 19:40:50,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:40:50,372 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:40:50,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:40:50,373 INFO L85 PathProgramCache]: Analyzing trace with hash 115757833, now seen corresponding path program 1 times [2022-11-16 19:40:50,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:40:50,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554501871] [2022-11-16 19:40:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:40:50,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:40:50,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:40:50,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550886699] [2022-11-16 19:40:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:40:50,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:40:50,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:40:50,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:40:50,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:40:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:40:50,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:40:50,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:40:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:40:50,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:40:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:40:50,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:40:50,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554501871] [2022-11-16 19:40:50,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:40:50,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550886699] [2022-11-16 19:40:50,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550886699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:40:50,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717713162] [2022-11-16 19:40:50,534 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:40:50,537 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:40:50,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:40:50,538 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:40:50,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:40:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:50,586 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-16 19:40:50,587 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 24 treesize of output 40 [2022-11-16 19:40:50,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:50,639 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:40:50,639 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 [2022-11-16 19:40:50,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:50,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:50,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-16 19:40:50,756 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:40:50,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:50,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:50,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:50,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:40:51,000 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-16 19:40:51,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 519 treesize of output 579 [2022-11-16 19:40:51,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:40:51,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 302 [2022-11-16 19:40:51,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:51,416 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-16 19:40:51,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 671 treesize of output 662 [2022-11-16 19:40:51,474 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 19:40:51,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 640 treesize of output 634 [2022-11-16 19:40:51,834 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:40:57,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-16 19:40:57,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 19:40:57,179 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:40:57,539 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '168#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:40:57,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:40:57,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:40:57,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-16 19:40:57,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65179179] [2022-11-16 19:40:57,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:40:57,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:40:57,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:40:57,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:40:57,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:40:57,542 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:40:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:40:57,581 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-11-16 19:40:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:40:57,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:40:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:40:57,582 INFO L225 Difference]: With dead ends: 20 [2022-11-16 19:40:57,582 INFO L226 Difference]: Without dead ends: 13 [2022-11-16 19:40:57,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:40:57,584 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:40:57,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:40:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-16 19:40:57,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-16 19:40:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:40:57,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-16 19:40:57,594 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2022-11-16 19:40:57,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:40:57,594 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-16 19:40:57,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:40:57,595 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-16 19:40:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:40:57,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:40:57,595 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 19:40:57,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 19:40:57,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-16 19:40:57,800 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:40:57,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:40:57,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1538090498, now seen corresponding path program 2 times [2022-11-16 19:40:57,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:40:57,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041984541] [2022-11-16 19:40:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:40:57,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:40:57,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:40:57,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036357962] [2022-11-16 19:40:57,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:40:57,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:40:57,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:40:57,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:40:57,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:40:57,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:40:57,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:40:57,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:40:57,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:40:58,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:58,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 74 [2022-11-16 19:40:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:40:58,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:40:58,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:58,543 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 106 treesize of output 94 [2022-11-16 19:40:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:40:58,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:40:58,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041984541] [2022-11-16 19:40:58,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:40:58,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036357962] [2022-11-16 19:40:58,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036357962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:40:58,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [962793459] [2022-11-16 19:40:58,892 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:40:58,892 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:40:58,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:40:58,892 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:40:58,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:40:58,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:58,935 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-16 19:40:58,936 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 24 treesize of output 40 [2022-11-16 19:40:58,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:58,977 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:40:58,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-16 19:40:59,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:59,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:59,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-16 19:40:59,035 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:40:59,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:59,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:59,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:59,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:40:59,258 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-16 19:40:59,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 504 treesize of output 564 [2022-11-16 19:40:59,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:40:59,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 297 treesize of output 289 [2022-11-16 19:41:00,965 INFO L321 Elim1Store]: treesize reduction 181, result has 0.5 percent of original size [2022-11-16 19:41:00,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 9 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 11 new quantified variables, introduced 10 case distinctions, treesize of input 2240 treesize of output 2441 [2022-11-16 19:41:01,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2161 treesize of output 2073 [2022-11-16 19:41:01,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:01,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2084 treesize of output 2067 [2022-11-16 19:41:01,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:01,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:01,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:01,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 2063 treesize of output 2052 [2022-11-16 19:41:01,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:01,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2052 treesize of output 2043 [2022-11-16 19:41:01,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:01,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2043 treesize of output 2034 [2022-11-16 19:41:05,363 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:05,687 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:05,706 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:05,729 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:05,747 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:06,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-16 19:41:06,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 19:41:06,266 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:41:06,642 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '298#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:41:06,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:41:06,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:41:06,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-16 19:41:06,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227038234] [2022-11-16 19:41:06,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:41:06,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 19:41:06,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:41:06,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 19:41:06,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:41:06,644 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:06,758 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-11-16 19:41:06,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 19:41:06,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 19:41:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:06,759 INFO L225 Difference]: With dead ends: 21 [2022-11-16 19:41:06,759 INFO L226 Difference]: Without dead ends: 19 [2022-11-16 19:41:06,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-16 19:41:06,763 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:06,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 7 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-11-16 19:41:06,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-16 19:41:06,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-16 19:41:06,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-16 19:41:06,769 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2022-11-16 19:41:06,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:06,770 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-16 19:41:06,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:06,770 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-16 19:41:06,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:41:06,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:06,771 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2022-11-16 19:41:06,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:41:06,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:06,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:06,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1414643970, now seen corresponding path program 3 times [2022-11-16 19:41:06,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:06,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419845425] [2022-11-16 19:41:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:06,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:07,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:41:07,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332144306] [2022-11-16 19:41:07,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:41:07,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:07,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:07,007 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:07,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:41:07,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:41:07,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:41:07,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 19:41:07,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 19:41:07,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:41:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 19:41:07,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:41:07,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419845425] [2022-11-16 19:41:07,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:41:07,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332144306] [2022-11-16 19:41:07,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332144306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:07,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1363383139] [2022-11-16 19:41:07,214 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:41:07,214 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:41:07,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:41:07,215 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:41:07,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:41:07,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:07,259 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-16 19:41:07,260 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 24 treesize of output 40 [2022-11-16 19:41:07,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:07,303 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:41:07,303 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 [2022-11-16 19:41:07,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:07,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:07,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-16 19:41:07,367 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:07,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:07,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:07,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:07,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:07,492 INFO L321 Elim1Store]: treesize reduction 149, result has 4.5 percent of original size [2022-11-16 19:41:07,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 542 treesize of output 594 [2022-11-16 19:41:07,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:07,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:41:07,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 361 treesize of output 356 [2022-11-16 19:41:07,668 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:07,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:07,758 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-16 19:41:07,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 342 treesize of output 329 [2022-11-16 19:41:07,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 279 [2022-11-16 19:41:08,134 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 16 treesize of output 12 [2022-11-16 19:41:08,142 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 53 treesize of output 49 [2022-11-16 19:41:08,223 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:41:08,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '477#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:41:08,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:41:08,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:41:08,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-16 19:41:08,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626632494] [2022-11-16 19:41:08,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:41:08,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 19:41:08,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:41:08,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 19:41:08,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:41:08,595 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:08,652 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-11-16 19:41:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:41:08,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 19:41:08,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:08,657 INFO L225 Difference]: With dead ends: 38 [2022-11-16 19:41:08,657 INFO L226 Difference]: Without dead ends: 25 [2022-11-16 19:41:08,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:41:08,658 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:08,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:41:08,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-16 19:41:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-16 19:41:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-16 19:41:08,665 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2022-11-16 19:41:08,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:08,666 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-16 19:41:08,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-16 19:41:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 19:41:08,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:08,667 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1] [2022-11-16 19:41:08,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:41:08,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:08,871 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:08,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:08,871 INFO L85 PathProgramCache]: Analyzing trace with hash 965901086, now seen corresponding path program 4 times [2022-11-16 19:41:08,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:08,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117189993] [2022-11-16 19:41:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:08,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:08,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:41:08,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818756339] [2022-11-16 19:41:08,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:41:08,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:08,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:08,892 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:08,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:41:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:41:09,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 19:41:09,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 19:41:09,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:41:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 19:41:09,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:41:09,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117189993] [2022-11-16 19:41:09,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:41:09,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818756339] [2022-11-16 19:41:09,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818756339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:09,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [353086207] [2022-11-16 19:41:09,390 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:41:09,390 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:41:09,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:41:09,391 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:41:09,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:41:09,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:09,438 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:41:09,439 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 [2022-11-16 19:41:09,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:09,450 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 24 treesize of output 32 [2022-11-16 19:41:09,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:09,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:09,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-16 19:41:09,496 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:09,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:09,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:09,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:09,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:09,613 INFO L321 Elim1Store]: treesize reduction 149, result has 4.5 percent of original size [2022-11-16 19:41:09,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 553 treesize of output 605 [2022-11-16 19:41:09,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:09,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:41:09,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 368 treesize of output 361 [2022-11-16 19:41:09,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:41:09,973 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:10,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:41:10,008 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:10,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:10,069 INFO L321 Elim1Store]: treesize reduction 47, result has 14.5 percent of original size [2022-11-16 19:41:10,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 360 treesize of output 337 [2022-11-16 19:41:10,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 28 [2022-11-16 19:41:10,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-16 19:41:10,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 19:41:10,309 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:41:10,664 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '741#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:41:10,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:41:10,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:41:10,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-16 19:41:10,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269130904] [2022-11-16 19:41:10,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:41:10,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 19:41:10,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:41:10,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 19:41:10,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2022-11-16 19:41:10,666 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:10,746 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-11-16 19:41:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 19:41:10,755 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-16 19:41:10,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:10,759 INFO L225 Difference]: With dead ends: 50 [2022-11-16 19:41:10,759 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 19:41:10,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2022-11-16 19:41:10,763 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:10,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:41:10,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 19:41:10,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-16 19:41:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-16 19:41:10,786 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 24 [2022-11-16 19:41:10,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:10,786 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-16 19:41:10,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-16 19:41:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 19:41:10,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:10,788 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 3, 3, 1, 1, 1, 1] [2022-11-16 19:41:10,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:41:10,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:10,993 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:10,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:10,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1125373090, now seen corresponding path program 5 times [2022-11-16 19:41:10,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:10,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129739496] [2022-11-16 19:41:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:10,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:11,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:41:11,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674985444] [2022-11-16 19:41:11,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:41:11,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:11,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:11,021 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:11,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:41:11,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 19:41:11,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:41:11,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:41:11,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:11,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:41:11,700 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 57 treesize of output 45 [2022-11-16 19:41:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-16 19:41:11,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:41:13,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:41:13,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 183 treesize of output 255 [2022-11-16 19:41:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-16 19:41:14,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:41:14,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129739496] [2022-11-16 19:41:14,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:41:14,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674985444] [2022-11-16 19:41:14,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674985444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:14,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1480332351] [2022-11-16 19:41:14,923 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:41:14,923 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:41:14,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:41:14,924 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:41:14,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:41:14,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:14,963 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:41:14,963 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 [2022-11-16 19:41:14,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:14,975 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 24 treesize of output 32 [2022-11-16 19:41:14,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:14,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:14,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-16 19:41:15,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:15,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:15,011 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 63 treesize of output 54 [2022-11-16 19:41:15,018 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 30 treesize of output 28 [2022-11-16 19:41:15,057 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 53 treesize of output 49 [2022-11-16 19:41:15,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-16 19:41:15,156 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:41:15,580 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1115#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:41:15,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:41:15,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:41:15,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-16 19:41:15,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798123354] [2022-11-16 19:41:15,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:41:15,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 19:41:15,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:41:15,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 19:41:15,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-11-16 19:41:15,583 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:16,443 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-11-16 19:41:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 19:41:16,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-16 19:41:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:16,445 INFO L225 Difference]: With dead ends: 51 [2022-11-16 19:41:16,445 INFO L226 Difference]: Without dead ends: 49 [2022-11-16 19:41:16,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2022-11-16 19:41:16,447 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:16,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-11-16 19:41:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-16 19:41:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-16 19:41:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-16 19:41:16,462 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 36 [2022-11-16 19:41:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:16,462 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-16 19:41:16,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:16,463 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-16 19:41:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 19:41:16,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:16,464 INFO L195 NwaCegarLoop]: trace histogram [22, 8, 7, 7, 1, 1, 1, 1] [2022-11-16 19:41:16,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 19:41:16,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 19:41:16,670 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:16,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:16,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1981504162, now seen corresponding path program 6 times [2022-11-16 19:41:16,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:16,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521732686] [2022-11-16 19:41:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:16,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:16,699 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:41:16,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881882694] [2022-11-16 19:41:16,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:41:16,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:16,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:16,701 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:16,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 19:41:16,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:41:16,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:41:16,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 19:41:16,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-16 19:41:17,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:41:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-16 19:41:18,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:41:18,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521732686] [2022-11-16 19:41:18,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:41:18,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881882694] [2022-11-16 19:41:18,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881882694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:18,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [113588214] [2022-11-16 19:41:18,137 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:41:18,137 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:41:18,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:41:18,137 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:41:18,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:41:18,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:18,182 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:41:18,183 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 [2022-11-16 19:41:18,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:18,200 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 24 treesize of output 32 [2022-11-16 19:41:18,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:18,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:18,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-16 19:41:18,238 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:18,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:18,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:18,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:18,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:41:18,436 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-16 19:41:18,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 519 treesize of output 579 [2022-11-16 19:41:18,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:41:18,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 302 [2022-11-16 19:41:18,925 INFO L321 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-11-16 19:41:18,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1031 treesize of output 1009 [2022-11-16 19:41:18,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:18,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:18,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:18,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 974 treesize of output 963 [2022-11-16 19:41:18,969 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 973 treesize of output 963 [2022-11-16 19:41:19,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:19,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 918 treesize of output 899 [2022-11-16 19:41:19,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:19,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 895 treesize of output 886 [2022-11-16 19:41:19,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:19,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:19,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:19,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 886 treesize of output 875 [2022-11-16 19:41:19,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:19,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 875 treesize of output 866 [2022-11-16 19:41:24,297 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:41:24,448 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1626#(and (<= 0 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2022-11-16 19:41:24,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:41:24,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:41:24,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2022-11-16 19:41:24,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958519972] [2022-11-16 19:41:24,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:41:24,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 19:41:24,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:41:24,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 19:41:24,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=1513, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 19:41:24,452 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:24,600 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2022-11-16 19:41:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 19:41:24,601 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-16 19:41:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:24,601 INFO L225 Difference]: With dead ends: 98 [2022-11-16 19:41:24,601 INFO L226 Difference]: Without dead ends: 73 [2022-11-16 19:41:24,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1139, Invalid=1513, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 19:41:24,603 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:24,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:41:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-16 19:41:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-11-16 19:41:24,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-11-16 19:41:24,620 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 48 [2022-11-16 19:41:24,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:24,620 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-11-16 19:41:24,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:24,620 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-11-16 19:41:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-16 19:41:24,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:24,622 INFO L195 NwaCegarLoop]: trace histogram [46, 8, 7, 7, 1, 1, 1, 1] [2022-11-16 19:41:24,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 19:41:24,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 19:41:24,828 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:24,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:24,829 INFO L85 PathProgramCache]: Analyzing trace with hash -378001954, now seen corresponding path program 7 times [2022-11-16 19:41:24,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:24,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012305110] [2022-11-16 19:41:24,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:24,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:24,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:41:24,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391648443] [2022-11-16 19:41:24,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:41:24,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:24,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:24,869 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:24,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 19:41:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:41:25,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 19:41:25,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-16 19:41:26,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:41:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-16 19:41:29,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:41:29,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012305110] [2022-11-16 19:41:29,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:41:29,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391648443] [2022-11-16 19:41:29,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391648443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:29,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11260843] [2022-11-16 19:41:29,832 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:41:29,832 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:41:29,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:41:29,833 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:41:29,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:41:29,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:29,877 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:41:29,878 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 [2022-11-16 19:41:29,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:29,889 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 24 treesize of output 32 [2022-11-16 19:41:29,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:29,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:29,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-16 19:41:29,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:29,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:29,930 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 80 treesize of output 71 [2022-11-16 19:41:29,937 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 47 treesize of output 40 [2022-11-16 19:41:29,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-16 19:41:29,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 19:41:30,119 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:41:30,713 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2441#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:41:30,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:41:30,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:41:30,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2022-11-16 19:41:30,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923695524] [2022-11-16 19:41:30,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:41:30,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-16 19:41:30,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:41:30,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-16 19:41:30,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4576, Invalid=5524, Unknown=0, NotChecked=0, Total=10100 [2022-11-16 19:41:30,720 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:31,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:31,012 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2022-11-16 19:41:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-16 19:41:31,013 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-16 19:41:31,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:31,018 INFO L225 Difference]: With dead ends: 146 [2022-11-16 19:41:31,018 INFO L226 Difference]: Without dead ends: 121 [2022-11-16 19:41:31,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4576, Invalid=5524, Unknown=0, NotChecked=0, Total=10100 [2022-11-16 19:41:31,023 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:31,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:41:31,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-16 19:41:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-16 19:41:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-11-16 19:41:31,063 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 72 [2022-11-16 19:41:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:31,063 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-11-16 19:41:31,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-11-16 19:41:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-16 19:41:31,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:31,073 INFO L195 NwaCegarLoop]: trace histogram [94, 8, 7, 7, 1, 1, 1, 1] [2022-11-16 19:41:31,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 19:41:31,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:31,280 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:31,280 INFO L85 PathProgramCache]: Analyzing trace with hash 504538846, now seen corresponding path program 8 times [2022-11-16 19:41:31,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:31,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414067312] [2022-11-16 19:41:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:31,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:31,358 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:41:31,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021925311] [2022-11-16 19:41:31,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:41:31,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:31,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:31,367 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:31,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 19:41:34,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 19:41:34,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:41:34,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 19:41:34,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:35,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:41:35,718 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 57 treesize of output 45 [2022-11-16 19:41:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4542 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-16 19:41:35,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:41:39,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:41:39,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 278 treesize of output 466 [2022-11-16 19:41:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4542 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-16 19:41:48,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:41:48,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414067312] [2022-11-16 19:41:48,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:41:48,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021925311] [2022-11-16 19:41:48,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021925311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:48,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [362526087] [2022-11-16 19:41:48,749 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:41:48,750 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:41:48,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:41:48,750 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:41:48,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:41:48,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:48,786 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:41:48,787 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 [2022-11-16 19:41:48,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:48,797 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 24 treesize of output 32 [2022-11-16 19:41:48,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:48,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:48,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-16 19:41:48,832 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:48,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:48,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:48,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:41:48,969 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-16 19:41:48,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 508 treesize of output 568 [2022-11-16 19:41:48,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:41:49,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 305 treesize of output 297 [2022-11-16 19:41:50,008 INFO L321 Elim1Store]: treesize reduction 139, result has 3.5 percent of original size [2022-11-16 19:41:50,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 7 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 1225 treesize of output 1344 [2022-11-16 19:41:50,095 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 19:41:50,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1241 treesize of output 1229 [2022-11-16 19:41:51,774 INFO L321 Elim1Store]: treesize reduction 175, result has 2.8 percent of original size [2022-11-16 19:41:51,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 9 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 611 treesize of output 855 [2022-11-16 19:41:52,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:52,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:52,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 7 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 80 [2022-11-16 19:41:52,701 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 22 treesize of output 15 [2022-11-16 19:41:52,714 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:52,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:41:52,736 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:52,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:52,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 7 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 313 treesize of output 484 [2022-11-16 19:41:52,888 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:52,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:52,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 149 [2022-11-16 19:41:52,983 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:53,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:53,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 241 [2022-11-16 19:41:53,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:41:53,330 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:41:53,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 19:41:53,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-16 19:41:53,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:41:54,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3663#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:41:54,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:41:54,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:41:54,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-16 19:41:54,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249411016] [2022-11-16 19:41:54,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:41:54,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 19:41:54,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:41:54,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 19:41:54,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2022-11-16 19:41:54,215 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:57,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:57,089 INFO L93 Difference]: Finished difference Result 147 states and 155 transitions. [2022-11-16 19:41:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 19:41:57,090 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-16 19:41:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:57,091 INFO L225 Difference]: With dead ends: 147 [2022-11-16 19:41:57,091 INFO L226 Difference]: Without dead ends: 145 [2022-11-16 19:41:57,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=627, Invalid=1443, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 19:41:57,092 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:57,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 38 Unchecked, 0.0s Time] [2022-11-16 19:41:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-16 19:41:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-11-16 19:41:57,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:57,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-11-16 19:41:57,122 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 120 [2022-11-16 19:41:57,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:57,122 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-11-16 19:41:57,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-11-16 19:41:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-16 19:41:57,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:57,125 INFO L195 NwaCegarLoop]: trace histogram [94, 16, 15, 15, 1, 1, 1, 1] [2022-11-16 19:41:57,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 19:41:57,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 19:41:57,335 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:41:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash 809638622, now seen corresponding path program 9 times [2022-11-16 19:41:57,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:41:57,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361892285] [2022-11-16 19:41:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:41:57,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:41:57,404 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:41:57,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925170367] [2022-11-16 19:41:57,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:41:57,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:57,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:57,406 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:57,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 19:41:57,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:41:57,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:41:57,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-16 19:41:57,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:42:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-11-16 19:42:02,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:42:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-11-16 19:42:15,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:15,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361892285] [2022-11-16 19:42:15,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:42:15,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925170367] [2022-11-16 19:42:15,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925170367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:42:15,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039806111] [2022-11-16 19:42:15,275 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:42:15,275 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:42:15,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:42:15,276 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:42:15,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:42:15,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:15,315 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:42:15,315 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 [2022-11-16 19:42:15,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:15,326 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 24 treesize of output 32 [2022-11-16 19:42:15,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:15,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:15,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-16 19:42:15,363 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:42:15,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:15,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:15,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:15,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:15,516 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-16 19:42:15,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 534 treesize of output 594 [2022-11-16 19:42:15,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:15,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 327 treesize of output 315 [2022-11-16 19:42:16,107 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-16 19:42:16,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 751 treesize of output 732 [2022-11-16 19:42:16,146 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 19:42:16,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 676 treesize of output 666 [2022-11-16 19:42:16,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:16,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-11-16 19:42:16,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:16,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:16,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:42:16,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 41 [2022-11-16 19:42:16,289 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:42:16,955 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 16 treesize of output 12 [2022-11-16 19:42:16,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 19:42:17,027 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:42:17,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5270#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:42:17,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:42:17,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:42:17,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 191 [2022-11-16 19:42:17,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072194108] [2022-11-16 19:42:17,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:42:17,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-11-16 19:42:17,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:17,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-11-16 19:42:17,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18348, Invalid=20264, Unknown=0, NotChecked=0, Total=38612 [2022-11-16 19:42:17,754 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:42:18,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:18,551 INFO L93 Difference]: Finished difference Result 290 states and 387 transitions. [2022-11-16 19:42:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-16 19:42:18,551 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-11-16 19:42:18,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:18,553 INFO L225 Difference]: With dead ends: 290 [2022-11-16 19:42:18,553 INFO L226 Difference]: Without dead ends: 241 [2022-11-16 19:42:18,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=18348, Invalid=20264, Unknown=0, NotChecked=0, Total=38612 [2022-11-16 19:42:18,558 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:18,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 42 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:42:18,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-16 19:42:18,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-11-16 19:42:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0083333333333333) internal successors, (242), 240 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:42:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2022-11-16 19:42:18,606 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 144 [2022-11-16 19:42:18,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:18,607 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2022-11-16 19:42:18,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:42:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2022-11-16 19:42:18,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-16 19:42:18,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:18,610 INFO L195 NwaCegarLoop]: trace histogram [190, 16, 15, 15, 1, 1, 1, 1] [2022-11-16 19:42:18,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 19:42:18,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 19:42:18,820 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:18,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1960778974, now seen corresponding path program 10 times [2022-11-16 19:42:18,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:18,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723177007] [2022-11-16 19:42:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:18,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:18,946 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:42:18,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801806430] [2022-11-16 19:42:18,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:42:18,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:18,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:42:18,947 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:42:18,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 19:42:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:19,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 2092 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-16 19:42:19,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:42:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18490 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-11-16 19:42:37,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18490 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-11-16 19:43:28,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:28,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723177007] [2022-11-16 19:43:28,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:43:28,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801806430] [2022-11-16 19:43:28,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801806430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:28,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005106037] [2022-11-16 19:43:28,773 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:28,773 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:28,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:28,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:28,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:28,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:28,807 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-16 19:43:28,807 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 24 treesize of output 40 [2022-11-16 19:43:28,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:28,849 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:43:28,850 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 [2022-11-16 19:43:28,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:28,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:28,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-16 19:43:28,892 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:43:28,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:28,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:28,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:29,068 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-16 19:43:29,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 512 treesize of output 572 [2022-11-16 19:43:29,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:29,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 313 treesize of output 305 [2022-11-16 19:43:30,047 INFO L321 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2022-11-16 19:43:30,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 623 treesize of output 587 [2022-11-16 19:43:30,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 553 treesize of output 529 [2022-11-16 19:43:30,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:30,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 572 treesize of output 563 [2022-11-16 19:43:30,099 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:43:30,128 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:43:30,136 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:43:30,404 INFO L321 Elim1Store]: treesize reduction 158, result has 3.1 percent of original size [2022-11-16 19:43:30,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 8 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 9 new quantified variables, introduced 9 case distinctions, treesize of input 922 treesize of output 1119 [2022-11-16 19:43:30,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:30,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 908 treesize of output 907 [2022-11-16 19:43:31,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:31,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:31,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-16 19:43:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:31,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 51 [2022-11-16 19:43:31,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:31,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-16 19:43:31,856 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 20 treesize of output 13 [2022-11-16 19:43:31,863 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:43:31,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:31,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 55 [2022-11-16 19:43:31,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:31,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:31,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:31,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 768 treesize of output 768 [2022-11-16 19:43:31,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:31,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 757 treesize of output 759 [2022-11-16 19:43:31,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:31,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:31,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:31,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 748 treesize of output 748 [2022-11-16 19:43:32,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:32,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 737 treesize of output 739 [2022-11-16 19:43:32,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 19:43:33,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-16 19:43:33,070 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:34,249 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8054#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:43:34,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:34,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:43:34,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192] total 383 [2022-11-16 19:43:34,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120669856] [2022-11-16 19:43:34,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:34,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2022-11-16 19:43:34,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:34,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2022-11-16 19:43:34,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73548, Invalid=77384, Unknown=0, NotChecked=0, Total=150932 [2022-11-16 19:43:34,282 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:36,924 INFO L93 Difference]: Finished difference Result 482 states and 675 transitions. [2022-11-16 19:43:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-16 19:43:36,928 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2022-11-16 19:43:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:36,930 INFO L225 Difference]: With dead ends: 482 [2022-11-16 19:43:36,930 INFO L226 Difference]: Without dead ends: 433 [2022-11-16 19:43:36,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2856 ImplicationChecksByTransitivity, 69.0s TimeCoverageRelationStatistics Valid=73548, Invalid=77384, Unknown=0, NotChecked=0, Total=150932 [2022-11-16 19:43:36,937 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:36,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 19:43:36,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-16 19:43:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2022-11-16 19:43:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.0046296296296295) internal successors, (434), 432 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 434 transitions. [2022-11-16 19:43:37,016 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 434 transitions. Word has length 240 [2022-11-16 19:43:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:37,017 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 434 transitions. [2022-11-16 19:43:37,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:37,018 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 434 transitions. [2022-11-16 19:43:37,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-11-16 19:43:37,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:37,026 INFO L195 NwaCegarLoop]: trace histogram [382, 16, 15, 15, 1, 1, 1, 1] [2022-11-16 19:43:37,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 19:43:37,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 19:43:37,240 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:43:37,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:37,240 INFO L85 PathProgramCache]: Analyzing trace with hash 357638366, now seen corresponding path program 11 times [2022-11-16 19:43:37,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:37,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742138838] [2022-11-16 19:43:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:37,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:37,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:43:37,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89500153] [2022-11-16 19:43:37,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:43:37,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:37,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:37,495 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:37,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 19:47:06,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-16 19:47:06,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:47:06,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 19:47:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:09,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:47:09,796 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 57 treesize of output 45 [2022-11-16 19:47:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 73498 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-16 19:47:09,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:47:22,357 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:47:22,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 367 treesize of output 439 [2022-11-16 19:48:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 73498 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-16 19:48:35,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:48:35,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742138838] [2022-11-16 19:48:35,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:48:35,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89500153] [2022-11-16 19:48:35,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89500153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:48:35,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [622952136] [2022-11-16 19:48:35,487 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:48:35,488 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:48:35,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:48:35,488 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:48:35,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:48:35,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:35,527 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:48:35,528 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 [2022-11-16 19:48:35,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:35,543 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 24 treesize of output 32 [2022-11-16 19:48:35,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:35,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:35,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-16 19:48:35,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:35,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:35,592 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 59 treesize of output 50 [2022-11-16 19:48:35,599 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 30 treesize of output 28 [2022-11-16 19:48:35,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 19:48:35,638 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 16 treesize of output 12 [2022-11-16 19:48:35,722 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:48:36,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12412#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:48:36,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:48:36,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:48:36,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2022-11-16 19:48:36,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347121119] [2022-11-16 19:48:36,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:48:36,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 19:48:36,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:48:36,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 19:48:36,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1257, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 19:48:36,343 INFO L87 Difference]: Start difference. First operand 433 states and 434 transitions. Second operand has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 37 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:49,971 INFO L93 Difference]: Finished difference Result 483 states and 499 transitions. [2022-11-16 19:48:49,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 19:48:49,971 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 37 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 432 [2022-11-16 19:48:49,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:49,974 INFO L225 Difference]: With dead ends: 483 [2022-11-16 19:48:49,974 INFO L226 Difference]: Without dead ends: 481 [2022-11-16 19:48:49,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1337 GetRequests, 1253 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1726 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=2383, Invalid=4927, Unknown=0, NotChecked=0, Total=7310 [2022-11-16 19:48:49,976 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:49,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 79 Unchecked, 0.0s Time] [2022-11-16 19:48:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-11-16 19:48:50,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 481. [2022-11-16 19:48:50,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.0041666666666667) internal successors, (482), 480 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:50,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 482 transitions. [2022-11-16 19:48:50,039 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 482 transitions. Word has length 432 [2022-11-16 19:48:50,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:50,040 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 482 transitions. [2022-11-16 19:48:50,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 37 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 482 transitions. [2022-11-16 19:48:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2022-11-16 19:48:50,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:50,044 INFO L195 NwaCegarLoop]: trace histogram [382, 32, 31, 31, 1, 1, 1, 1] [2022-11-16 19:48:50,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 19:48:50,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:50,255 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:48:50,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash 519571678, now seen corresponding path program 12 times [2022-11-16 19:48:50,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:48:50,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715310996] [2022-11-16 19:48:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:48:50,490 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:48:50,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452746769] [2022-11-16 19:48:50,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:48:50,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:50,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:48:50,492 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:48:50,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 19:48:52,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:48:52,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:48:52,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 4156 conjuncts, 385 conjunts are in the unsatisfiable core [2022-11-16 19:48:52,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 74610 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2022-11-16 19:50:03,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:53:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 74610 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2022-11-16 19:53:32,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:53:32,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715310996] [2022-11-16 19:53:32,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:53:32,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452746769] [2022-11-16 19:53:32,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452746769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:53:32,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [210582479] [2022-11-16 19:53:32,008 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:53:32,008 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:53:32,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:53:32,008 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:53:32,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:53:32,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:32,040 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-16 19:53:32,041 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 24 treesize of output 40 [2022-11-16 19:53:32,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:32,075 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:53:32,075 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 [2022-11-16 19:53:32,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:32,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:32,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-16 19:53:32,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:32,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:32,138 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 72 treesize of output 63 [2022-11-16 19:53:32,144 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 47 treesize of output 40 [2022-11-16 19:53:32,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 19:53:32,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-16 19:53:32,257 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:53:34,462 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17939#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:53:34,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:53:34,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:53:34,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384] total 767 [2022-11-16 19:53:34,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855638527] [2022-11-16 19:53:34,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:53:34,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2022-11-16 19:53:34,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:53:34,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2022-11-16 19:53:34,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294540, Invalid=302216, Unknown=0, NotChecked=0, Total=596756 [2022-11-16 19:53:34,619 INFO L87 Difference]: Start difference. First operand 481 states and 482 transitions. Second operand has 768 states, 768 states have (on average 1.0065104166666667) internal successors, (773), 767 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:47,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:47,038 INFO L93 Difference]: Finished difference Result 962 states and 1347 transitions. [2022-11-16 19:53:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-11-16 19:53:47,039 INFO L78 Accepts]: Start accepts. Automaton has has 768 states, 768 states have (on average 1.0065104166666667) internal successors, (773), 767 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 480 [2022-11-16 19:53:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:47,043 INFO L225 Difference]: With dead ends: 962 [2022-11-16 19:53:47,043 INFO L226 Difference]: Without dead ends: 865 [2022-11-16 19:53:47,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1438 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 771 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5736 ImplicationChecksByTransitivity, 279.6s TimeCoverageRelationStatistics Valid=294540, Invalid=302216, Unknown=0, NotChecked=0, Total=596756 [2022-11-16 19:53:47,090 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:47,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 19:53:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-11-16 19:53:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 865. [2022-11-16 19:53:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 1.0023148148148149) internal successors, (866), 864 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 866 transitions. [2022-11-16 19:53:47,207 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 866 transitions. Word has length 480 [2022-11-16 19:53:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:47,207 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 866 transitions. [2022-11-16 19:53:47,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 768 states, 768 states have (on average 1.0065104166666667) internal successors, (773), 767 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 866 transitions. [2022-11-16 19:53:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 865 [2022-11-16 19:53:47,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:47,217 INFO L195 NwaCegarLoop]: trace histogram [766, 32, 31, 31, 1, 1, 1, 1] [2022-11-16 19:53:47,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 19:53:47,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 19:53:47,423 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:53:47,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1905004766, now seen corresponding path program 13 times [2022-11-16 19:53:47,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:53:47,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713315368] [2022-11-16 19:53:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:47,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:53:47,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:53:47,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150127967] [2022-11-16 19:53:47,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:53:47,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:53:47,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:53:47,875 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:53:47,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be7da938-bcac-4049-a599-bfdcee529d47/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 19:53:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:52,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 7996 conjuncts, 769 conjunts are in the unsatisfiable core [2022-11-16 19:53:52,114 INFO L286 TraceCheckSpWp]: Computing forward predicates...