./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/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_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/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_aed2e0f8-aae4-4398-8250-4aac3e7ce088/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 d56d00b0e11a2318dd34043554d32ecd228c75c86ba1d3fcabadd2cc271a05aa --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 20:02:17,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:02:17,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:02:17,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:02:17,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:02:17,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:02:17,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:02:17,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:02:17,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:02:17,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:02:17,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:02:17,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:02:17,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:02:17,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:02:17,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:02:17,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:02:17,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:02:17,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:02:17,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:02:17,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:02:17,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:02:17,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:02:17,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:02:17,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:02:17,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:02:17,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:02:17,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:02:17,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:02:17,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:02:17,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:02:17,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:02:17,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:02:17,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:02:17,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:02:17,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:02:17,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:02:17,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:02:17,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:02:17,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:02:17,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:02:17,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:02:17,455 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:02:17,477 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:02:17,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:02:17,478 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:02:17,478 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:02:17,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:02:17,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:02:17,479 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:02:17,479 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:02:17,479 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:02:17,480 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:02:17,480 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:02:17,480 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:02:17,480 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:02:17,480 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:02:17,480 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:02:17,481 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:02:17,481 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:02:17,481 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:02:17,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:02:17,482 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:02:17,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:02:17,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:02:17,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:02:17,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:02:17,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:02:17,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:02:17,483 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:02:17,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:02:17,483 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:02:17,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:02:17,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:02:17,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:02:17,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:02:17,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:02:17,484 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:02:17,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:02:17,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:02:17,485 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:02:17,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:02:17,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:02:17,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:02:17,486 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_aed2e0f8-aae4-4398-8250-4aac3e7ce088/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d56d00b0e11a2318dd34043554d32ecd228c75c86ba1d3fcabadd2cc271a05aa [2022-11-16 20:02:17,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:02:17,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:02:17,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:02:17,809 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:02:17,810 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:02:17,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-programs/partial_mod_count_4.c [2022-11-16 20:02:17,901 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/data/258afbf08/ec5ebc8863e34354b0decca98f8de936/FLAGd99586884 [2022-11-16 20:02:18,348 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:02:18,349 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/sv-benchmarks/c/array-programs/partial_mod_count_4.c [2022-11-16 20:02:18,354 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/data/258afbf08/ec5ebc8863e34354b0decca98f8de936/FLAGd99586884 [2022-11-16 20:02:18,729 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/data/258afbf08/ec5ebc8863e34354b0decca98f8de936 [2022-11-16 20:02:18,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:02:18,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:02:18,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:02:18,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:02:18,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:02:18,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:02:18" (1/1) ... [2022-11-16 20:02:18,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12605e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:18, skipping insertion in model container [2022-11-16 20:02:18,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:02:18" (1/1) ... [2022-11-16 20:02:18,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:02:18,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:02:18,915 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_aed2e0f8-aae4-4398-8250-4aac3e7ce088/sv-benchmarks/c/array-programs/partial_mod_count_4.c[323,336] [2022-11-16 20:02:18,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:02:18,962 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:02:18,973 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_aed2e0f8-aae4-4398-8250-4aac3e7ce088/sv-benchmarks/c/array-programs/partial_mod_count_4.c[323,336] [2022-11-16 20:02:18,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:02:18,991 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:02:18,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:18 WrapperNode [2022-11-16 20:02:18,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:02:18,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:02:18,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:02:18,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:02:19,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:18" (1/1) ... [2022-11-16 20:02:19,008 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:18" (1/1) ... [2022-11-16 20:02:19,028 INFO L138 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2022-11-16 20:02:19,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:02:19,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:02:19,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:02:19,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:02:19,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:18" (1/1) ... [2022-11-16 20:02:19,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:18" (1/1) ... [2022-11-16 20:02:19,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:18" (1/1) ... [2022-11-16 20:02:19,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:18" (1/1) ... [2022-11-16 20:02:19,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:18" (1/1) ... [2022-11-16 20:02:19,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:18" (1/1) ... [2022-11-16 20:02:19,051 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:18" (1/1) ... [2022-11-16 20:02:19,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:18" (1/1) ... [2022-11-16 20:02:19,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:02:19,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:02:19,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:02:19,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:02:19,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:18" (1/1) ... [2022-11-16 20:02:19,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:02:19,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:02:19,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:02:19,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:02:19,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:02:19,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:02:19,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:02:19,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:02:19,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:02:19,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:02:19,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:02:19,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:02:19,223 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:02:19,226 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:02:19,454 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:02:19,556 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:02:19,556 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 20:02:19,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:02:19 BoogieIcfgContainer [2022-11-16 20:02:19,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:02:19,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:02:19,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:02:19,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:02:19,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:02:18" (1/3) ... [2022-11-16 20:02:19,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5038bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:02:19, skipping insertion in model container [2022-11-16 20:02:19,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:18" (2/3) ... [2022-11-16 20:02:19,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5038bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:02:19, skipping insertion in model container [2022-11-16 20:02:19,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:02:19" (3/3) ... [2022-11-16 20:02:19,581 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_4.c [2022-11-16 20:02:19,614 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:02:19,614 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:02:19,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:02:19,719 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;@343caf5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:02:19,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:02:19,740 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 20:02:19,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 20:02:19,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:02:19,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 20:02:19,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:02:19,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:02:19,753 INFO L85 PathProgramCache]: Analyzing trace with hash 83296886, now seen corresponding path program 1 times [2022-11-16 20:02:19,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:02:19,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267514502] [2022-11-16 20:02:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:19,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:02:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:02:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:02:20,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:02:20,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267514502] [2022-11-16 20:02:20,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267514502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:02:20,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:02:20,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:02:20,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997415846] [2022-11-16 20:02:20,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:02:20,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:02:20,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:02:20,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:02:20,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:02:20,207 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 20:02:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:02:20,272 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2022-11-16 20:02:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:02:20,274 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 20:02:20,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:02:20,286 INFO L225 Difference]: With dead ends: 15 [2022-11-16 20:02:20,286 INFO L226 Difference]: Without dead ends: 8 [2022-11-16 20:02:20,289 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 20:02:20,304 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 20:02:20,305 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 20:02:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-16 20:02:20,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-16 20:02:20,353 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 20:02:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-16 20:02:20,355 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-11-16 20:02:20,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:02:20,355 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-16 20:02:20,356 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 20:02:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-16 20:02:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 20:02:20,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:02:20,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 20:02:20,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:02:20,358 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:02:20,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:02:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1709852021, now seen corresponding path program 1 times [2022-11-16 20:02:20,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:02:20,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397839022] [2022-11-16 20:02:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:20,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:02:20,404 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:02:20,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632354236] [2022-11-16 20:02:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:20,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:20,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:02:20,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:02:20,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:02:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:02:20,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:02:20,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:02:20,657 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 20:02:20,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:02:20,687 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 20:02:20,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:02:20,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397839022] [2022-11-16 20:02:20,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:02:20,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632354236] [2022-11-16 20:02:20,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632354236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:02:20,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [665530645] [2022-11-16 20:02:20,724 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-16 20:02:20,726 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:02:20,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:02:20,736 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:02:20,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:02:20,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:20,874 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-16 20:02:20,876 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 20:02:20,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:20,955 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:02:20,957 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 20:02:21,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:21,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:21,040 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 20:02:21,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:21,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:21,114 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 20:02:21,128 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 20:02:21,292 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 20:02:21,311 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 20:02:21,413 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:02:21,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [665530645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:02:21,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:02:21,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2022-11-16 20:02:21,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251098671] [2022-11-16 20:02:21,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:02:21,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:02:21,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:02:21,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:02:21,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 20:02:21,670 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 20:02:21,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:02:21,721 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2022-11-16 20:02:21,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:02:21,721 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 20:02:21,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:02:21,722 INFO L225 Difference]: With dead ends: 13 [2022-11-16 20:02:21,722 INFO L226 Difference]: Without dead ends: 11 [2022-11-16 20:02:21,723 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 20:02:21,726 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 20:02:21,727 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 20:02:21,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-16 20:02:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2022-11-16 20:02:21,734 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 20:02:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-16 20:02:21,735 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-11-16 20:02:21,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:02:21,735 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-16 20:02:21,736 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 20:02:21,736 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-16 20:02:21,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 20:02:21,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:02:21,737 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:02:21,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 20:02:21,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:21,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:02:21,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:02:21,943 INFO L85 PathProgramCache]: Analyzing trace with hash 115757833, now seen corresponding path program 1 times [2022-11-16 20:02:21,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:02:21,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783665431] [2022-11-16 20:02:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:21,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:02:21,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:02:21,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056005750] [2022-11-16 20:02:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:21,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:21,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:02:21,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:02:21,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:02:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:02:22,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:02:22,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:02:22,060 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 20:02:22,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:02:22,081 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 20:02:22,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:02:22,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783665431] [2022-11-16 20:02:22,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:02:22,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056005750] [2022-11-16 20:02:22,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056005750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:02:22,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371148161] [2022-11-16 20:02:22,085 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 20:02:22,085 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:02:22,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:02:22,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:02:22,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:02:22,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:22,136 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-16 20:02:22,137 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 20:02:22,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:22,195 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:02:22,196 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 20:02:22,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:22,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:22,235 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 20:02:22,310 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:02:22,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:22,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:22,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:22,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:22,546 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-16 20:02:22,547 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 20:02:22,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:22,625 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 20:02:22,885 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:02:23,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:23,070 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-16 20:02:23,071 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 404 treesize of output 393 [2022-11-16 20:02:23,126 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 20:02:23,126 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 371 treesize of output 363 [2022-11-16 20:02:28,752 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:02:28,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '168#(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 20:02:28,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:02:28,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:02:28,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-16 20:02:28,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178413372] [2022-11-16 20:02:28,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:02:28,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:02:28,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:02:28,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:02:28,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:02:28,858 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 20:02:28,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:02:28,889 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-11-16 20:02:28,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:02:28,890 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 20:02:28,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:02:28,890 INFO L225 Difference]: With dead ends: 20 [2022-11-16 20:02:28,890 INFO L226 Difference]: Without dead ends: 13 [2022-11-16 20:02:28,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:02:28,892 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 20:02:28,892 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 20:02:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-16 20:02:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-16 20:02:28,897 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 20:02:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-16 20:02:28,898 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2022-11-16 20:02:28,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:02:28,898 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-16 20:02:28,898 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 20:02:28,899 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-16 20:02:28,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 20:02:28,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:02:28,900 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 20:02:28,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:02:29,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:29,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:02:29,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:02:29,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1538090498, now seen corresponding path program 2 times [2022-11-16 20:02:29,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:02:29,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082573747] [2022-11-16 20:02:29,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:29,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:02:29,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:02:29,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491546326] [2022-11-16 20:02:29,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:02:29,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:29,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:02:29,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:02:29,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:02:29,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 20:02:29,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:02:29,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 20:02:29,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:02:29,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:29,369 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 20:02:29,411 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 20:02:29,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:02:29,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:29,692 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 102 treesize of output 90 [2022-11-16 20:02:29,821 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 20:02:29,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:02:29,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082573747] [2022-11-16 20:02:29,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:02:29,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491546326] [2022-11-16 20:02:29,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491546326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:02:29,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [565007856] [2022-11-16 20:02:29,824 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 20:02:29,824 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:02:29,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:02:29,825 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:02:29,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:02:29,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:29,869 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-16 20:02:29,869 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 20:02:29,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:29,922 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:02:29,923 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 20:02:29,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:29,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:29,950 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 20:02:29,965 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:02:30,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:30,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:30,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:30,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:30,155 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-16 20:02:30,155 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 20:02:30,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:30,209 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 20:02:30,602 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:02:30,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:30,723 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-16 20:02:30,724 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 713 treesize of output 704 [2022-11-16 20:02:30,786 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 20:02:30,787 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 682 treesize of output 676 [2022-11-16 20:02:34,724 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 20:02:34,732 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 20:02:34,845 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:02:35,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '295#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 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) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:02:35,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:02:35,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:02:35,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 20:02:35,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506460402] [2022-11-16 20:02:35,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:02:35,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 20:02:35,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:02:35,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 20:02:35,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:02:35,281 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 20:02:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:02:35,390 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-11-16 20:02:35,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 20:02:35,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 20:02:35,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:02:35,391 INFO L225 Difference]: With dead ends: 21 [2022-11-16 20:02:35,392 INFO L226 Difference]: Without dead ends: 19 [2022-11-16 20:02:35,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:02:35,393 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:02:35,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 5 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-11-16 20:02:35,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-16 20:02:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-16 20:02:35,398 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 20:02:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-16 20:02:35,399 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2022-11-16 20:02:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:02:35,399 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-16 20:02:35,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 20:02:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-16 20:02:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 20:02:35,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:02:35,400 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2022-11-16 20:02:35,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 20:02:35,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:35,601 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:02:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:02:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1414643970, now seen corresponding path program 3 times [2022-11-16 20:02:35,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:02:35,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508583090] [2022-11-16 20:02:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:35,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:02:35,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:02:35,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057791471] [2022-11-16 20:02:35,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:02:35,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:35,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:02:35,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:02:35,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:02:35,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:02:35,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:02:35,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 20:02:35,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:02:35,754 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 20:02:35,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:02:35,818 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 20:02:35,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:02:35,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508583090] [2022-11-16 20:02:35,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:02:35,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057791471] [2022-11-16 20:02:35,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057791471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:02:35,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [242078871] [2022-11-16 20:02:35,822 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 20:02:35,822 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:02:35,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:02:35,823 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:02:35,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:02:35,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:35,864 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-16 20:02:35,864 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 20:02:35,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:35,907 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:02:35,908 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 20:02:35,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:35,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:35,948 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 20:02:35,963 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:02:36,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:36,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:36,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:36,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:36,082 INFO L321 Elim1Store]: treesize reduction 149, result has 4.5 percent of original size [2022-11-16 20:02:36,083 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 20:02:36,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:36,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:36,154 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 20:02:36,273 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:02:36,553 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 20:02:36,563 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 20:02:36,675 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:02:37,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '476#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 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) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:02:37,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:02:37,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:02:37,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-16 20:02:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811817070] [2022-11-16 20:02:37,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:02:37,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 20:02:37,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:02:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 20:02:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:02:37,094 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 20:02:37,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:02:37,149 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-11-16 20:02:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 20:02:37,150 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 20:02:37,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:02:37,151 INFO L225 Difference]: With dead ends: 38 [2022-11-16 20:02:37,151 INFO L226 Difference]: Without dead ends: 25 [2022-11-16 20:02:37,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:02:37,152 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:02:37,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:02:37,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-16 20:02:37,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-16 20:02:37,159 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 20:02:37,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-16 20:02:37,160 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2022-11-16 20:02:37,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:02:37,160 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-16 20:02:37,161 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 20:02:37,161 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-16 20:02:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 20:02:37,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:02:37,161 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1] [2022-11-16 20:02:37,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:02:37,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:37,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:02:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:02:37,368 INFO L85 PathProgramCache]: Analyzing trace with hash 965901086, now seen corresponding path program 4 times [2022-11-16 20:02:37,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:02:37,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252982062] [2022-11-16 20:02:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:37,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:02:37,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:02:37,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161017218] [2022-11-16 20:02:37,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:02:37,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:37,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:02:37,391 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:02:37,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:02:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:02:37,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 20:02:37,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:02:37,657 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 20:02:37,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:02:37,904 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 20:02:37,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:02:37,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252982062] [2022-11-16 20:02:37,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:02:37,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161017218] [2022-11-16 20:02:37,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161017218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:02:37,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1748488402] [2022-11-16 20:02:37,906 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 20:02:37,907 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:02:37,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:02:37,907 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:02:37,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:02:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:37,953 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:02:37,953 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 20:02:37,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:37,966 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 20:02:38,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:38,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:38,006 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 20:02:38,034 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:02:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:38,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:38,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:38,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:38,147 INFO L321 Elim1Store]: treesize reduction 149, result has 4.5 percent of original size [2022-11-16 20:02:38,148 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 20:02:38,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:38,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:38,219 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 20:02:38,334 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:02:38,503 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 20:02:38,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 20:02:38,621 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:02:39,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '740#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~R~0#1| 4) (<= 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 20:02:39,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:02:39,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:02:39,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-16 20:02:39,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236192788] [2022-11-16 20:02:39,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:02:39,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 20:02:39,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:02:39,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 20:02:39,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2022-11-16 20:02:39,056 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 20:02:39,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:02:39,146 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-11-16 20:02:39,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 20:02:39,151 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 20:02:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:02:39,154 INFO L225 Difference]: With dead ends: 50 [2022-11-16 20:02:39,154 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 20:02:39,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2022-11-16 20:02:39,158 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:02:39,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:02:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 20:02:39,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-16 20:02:39,177 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 20:02:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-16 20:02:39,185 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 24 [2022-11-16 20:02:39,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:02:39,185 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-16 20:02:39,186 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 20:02:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-16 20:02:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 20:02:39,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:02:39,187 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 3, 3, 1, 1, 1, 1] [2022-11-16 20:02:39,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:02:39,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 20:02:39,393 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:02:39,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:02:39,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1125373090, now seen corresponding path program 5 times [2022-11-16 20:02:39,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:02:39,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349396363] [2022-11-16 20:02:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:39,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:02:39,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:02:39,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665015779] [2022-11-16 20:02:39,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:02:39,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:39,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:02:39,428 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:02:39,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:02:39,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 20:02:39,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:02:39,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 20:02:39,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:02:40,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:40,121 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 20:02:40,166 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 20:02:40,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:02:41,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:41,631 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 186 treesize of output 258 [2022-11-16 20:02:43,382 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 20:02:43,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:02:43,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349396363] [2022-11-16 20:02:43,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:02:43,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665015779] [2022-11-16 20:02:43,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665015779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:02:43,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825798548] [2022-11-16 20:02:43,385 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 20:02:43,386 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:02:43,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:02:43,386 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:02:43,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:02:43,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:43,427 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:02:43,428 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 20:02:43,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:43,440 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 20:02:43,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:43,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:43,462 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 20:02:43,483 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:02:43,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:43,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:43,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:43,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:43,650 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-16 20:02:43,651 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 523 treesize of output 583 [2022-11-16 20:02:43,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:43,683 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 320 treesize of output 310 [2022-11-16 20:02:44,277 INFO L321 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2022-11-16 20:02:44,277 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 683 treesize of output 659 [2022-11-16 20:02:44,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:44,302 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 650 treesize of output 637 [2022-11-16 20:02:44,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:44,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:44,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:44,340 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 621 treesize of output 610 [2022-11-16 20:02:44,362 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 620 treesize of output 612 [2022-11-16 20:02:44,389 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:02:44,399 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:02:44,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:44,456 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-16 20:02:44,457 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 571 treesize of output 558 [2022-11-16 20:02:44,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:44,490 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 536 treesize of output 533 [2022-11-16 20:02:45,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 20:02:45,474 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 20:02:45,542 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:02:45,920 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1114#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~R~0#1| 4) (<= 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 20:02:45,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:02:45,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:02:45,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-16 20:02:45,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620578940] [2022-11-16 20:02:45,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:02:45,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 20:02:45,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:02:45,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 20:02:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-11-16 20:02:45,923 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 20:02:46,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:02:46,582 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-11-16 20:02:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 20:02:46,584 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 20:02:46,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:02:46,587 INFO L225 Difference]: With dead ends: 51 [2022-11-16 20:02:46,588 INFO L226 Difference]: Without dead ends: 49 [2022-11-16 20:02:46,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2022-11-16 20:02:46,590 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:02:46,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-11-16 20:02:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-16 20:02:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-16 20:02:46,612 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 20:02:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-16 20:02:46,614 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 36 [2022-11-16 20:02:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:02:46,615 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-16 20:02:46,615 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 20:02:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-16 20:02:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 20:02:46,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:02:46,620 INFO L195 NwaCegarLoop]: trace histogram [22, 8, 7, 7, 1, 1, 1, 1] [2022-11-16 20:02:46,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 20:02:46,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 20:02:46,826 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:02:46,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:02:46,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1981504162, now seen corresponding path program 6 times [2022-11-16 20:02:46,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:02:46,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063463716] [2022-11-16 20:02:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:46,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:02:46,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:02:46,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435173871] [2022-11-16 20:02:46,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:02:46,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:46,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:02:46,907 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:02:46,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:02:47,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:02:47,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:02:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 20:02:47,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:02:47,558 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 20:02:47,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:02:48,478 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 20:02:48,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:02:48,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063463716] [2022-11-16 20:02:48,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:02:48,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435173871] [2022-11-16 20:02:48,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435173871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:02:48,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447034946] [2022-11-16 20:02:48,483 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 20:02:48,484 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:02:48,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:02:48,484 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:02:48,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:02:48,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:48,530 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:02:48,531 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 20:02:48,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:48,545 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 20:02:48,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:48,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:48,568 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 20:02:48,579 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:02:48,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:48,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:48,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:48,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:48,723 INFO L321 Elim1Store]: treesize reduction 149, result has 4.5 percent of original size [2022-11-16 20:02:48,724 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 557 treesize of output 609 [2022-11-16 20:02:48,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:48,944 INFO L217 Elim1Store]: Index analysis took 133 ms [2022-11-16 20:02:48,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:48,966 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 376 treesize of output 369 [2022-11-16 20:02:49,229 INFO L321 Elim1Store]: treesize reduction 69, result has 1.4 percent of original size [2022-11-16 20:02:49,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 544 treesize of output 550 [2022-11-16 20:02:49,291 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 513 treesize of output 478 [2022-11-16 20:02:49,339 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:02:49,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 20:02:49,499 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 20:02:49,594 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:02:50,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1625#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 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) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:02:50,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:02:50,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:02:50,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2022-11-16 20:02:50,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142358883] [2022-11-16 20:02:50,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:02:50,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 20:02:50,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:02:50,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 20:02:50,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1144, Invalid=1612, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 20:02:50,077 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 20:02:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:02:50,321 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2022-11-16 20:02:50,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 20:02:50,322 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 20:02:50,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:02:50,323 INFO L225 Difference]: With dead ends: 98 [2022-11-16 20:02:50,323 INFO L226 Difference]: Without dead ends: 73 [2022-11-16 20:02:50,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1144, Invalid=1612, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 20:02:50,326 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:02:50,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:02:50,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-16 20:02:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-11-16 20:02:50,342 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 20:02:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-11-16 20:02:50,343 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 48 [2022-11-16 20:02:50,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:02:50,343 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-11-16 20:02:50,343 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 20:02:50,344 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-11-16 20:02:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-16 20:02:50,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:02:50,345 INFO L195 NwaCegarLoop]: trace histogram [46, 8, 7, 7, 1, 1, 1, 1] [2022-11-16 20:02:50,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 20:02:50,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:50,551 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:02:50,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:02:50,552 INFO L85 PathProgramCache]: Analyzing trace with hash -378001954, now seen corresponding path program 7 times [2022-11-16 20:02:50,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:02:50,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179180969] [2022-11-16 20:02:50,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:50,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:02:50,605 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:02:50,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741473022] [2022-11-16 20:02:50,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:02:50,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:50,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:02:50,607 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:02:50,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 20:02:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:02:50,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 20:02:50,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:02:52,326 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 20:02:52,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:02:55,644 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 20:02:55,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:02:55,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179180969] [2022-11-16 20:02:55,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:02:55,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741473022] [2022-11-16 20:02:55,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741473022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:02:55,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1139808144] [2022-11-16 20:02:55,647 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 20:02:55,647 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:02:55,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:02:55,648 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:02:55,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:02:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:55,691 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:02:55,691 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 20:02:55,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:55,701 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 20:02:55,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:55,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:55,737 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 20:02:55,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:55,768 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 20:02:55,775 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 20:02:55,818 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 20:02:55,828 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 20:02:55,926 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:02:56,510 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) (= |ULTIMATE.start_main_~R~0#1| 4) (<= 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 20:02:56,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:02:56,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:02:56,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2022-11-16 20:02:56,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842377638] [2022-11-16 20:02:56,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:02:56,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-16 20:02:56,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:02:56,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-16 20:02:56,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4572, Invalid=5528, Unknown=0, NotChecked=0, Total=10100 [2022-11-16 20:02:56,520 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 20:02:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:02:57,250 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2022-11-16 20:02:57,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-16 20:02:57,250 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 20:02:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:02:57,251 INFO L225 Difference]: With dead ends: 146 [2022-11-16 20:02:57,251 INFO L226 Difference]: Without dead ends: 121 [2022-11-16 20:02:57,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4572, Invalid=5528, Unknown=0, NotChecked=0, Total=10100 [2022-11-16 20:02:57,254 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:02:57,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 20:02:57,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-16 20:02:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-16 20:02:57,281 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 20:02:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-11-16 20:02:57,282 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 72 [2022-11-16 20:02:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:02:57,283 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-11-16 20:02:57,283 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 20:02:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-11-16 20:02:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-16 20:02:57,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:02:57,285 INFO L195 NwaCegarLoop]: trace histogram [94, 8, 7, 7, 1, 1, 1, 1] [2022-11-16 20:02:57,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 20:02:57,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:57,491 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:02:57,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:02:57,492 INFO L85 PathProgramCache]: Analyzing trace with hash 504538846, now seen corresponding path program 8 times [2022-11-16 20:02:57,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:02:57,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932843992] [2022-11-16 20:02:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:57,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:02:57,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:02:57,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293078882] [2022-11-16 20:02:57,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:02:57,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:57,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:02:57,563 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:02:57,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 20:03:00,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 20:03:00,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:03:00,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 20:03:00,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:03:01,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:03:01,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2022-11-16 20:03:01,205 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 20:03:01,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:03:05,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:03:05,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 259 treesize of output 383 [2022-11-16 20:03:14,169 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 20:03:14,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:03:14,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932843992] [2022-11-16 20:03:14,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:03:14,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293078882] [2022-11-16 20:03:14,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293078882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:03:14,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1799867042] [2022-11-16 20:03:14,172 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 20:03:14,172 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:03:14,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:03:14,173 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:03:14,173 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:03:14,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:14,217 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:03:14,218 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 20:03:14,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:14,229 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 20:03:14,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:14,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:14,250 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 20:03:14,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:14,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:14,279 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 20:03:14,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-16 20:03:14,317 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 20:03:14,329 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 20:03:14,442 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:03:14,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3663#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 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) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:03:14,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:03:14,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:03:14,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-16 20:03:14,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147399326] [2022-11-16 20:03:14,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:03:14,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 20:03:14,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:03:14,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 20:03:14,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2022-11-16 20:03:14,990 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 20:03:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:03:17,841 INFO L93 Difference]: Finished difference Result 147 states and 155 transitions. [2022-11-16 20:03:17,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 20:03:17,841 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 20:03:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:03:17,842 INFO L225 Difference]: With dead ends: 147 [2022-11-16 20:03:17,843 INFO L226 Difference]: Without dead ends: 145 [2022-11-16 20:03:17,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=627, Invalid=1443, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 20:03:17,844 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:03:17,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-16 20:03:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-16 20:03:17,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-11-16 20:03:17,872 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 20:03:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-11-16 20:03:17,873 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 120 [2022-11-16 20:03:17,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:03:17,874 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-11-16 20:03:17,874 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 20:03:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-11-16 20:03:17,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-16 20:03:17,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:03:17,877 INFO L195 NwaCegarLoop]: trace histogram [94, 16, 15, 15, 1, 1, 1, 1] [2022-11-16 20:03:17,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 20:03:18,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:03:18,083 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:03:18,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:03:18,084 INFO L85 PathProgramCache]: Analyzing trace with hash 809638622, now seen corresponding path program 9 times [2022-11-16 20:03:18,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:03:18,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884335870] [2022-11-16 20:03:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:03:18,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:03:18,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:03:18,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326337971] [2022-11-16 20:03:18,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:03:18,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:03:18,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:03:18,155 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:03:18,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 20:03:18,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:03:18,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:03:18,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-16 20:03:18,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:03:23,448 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 20:03:23,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:03:36,147 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 20:03:36,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:03:36,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884335870] [2022-11-16 20:03:36,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:03:36,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326337971] [2022-11-16 20:03:36,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326337971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:03:36,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [678831259] [2022-11-16 20:03:36,150 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 20:03:36,150 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:03:36,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:03:36,150 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:03:36,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:03:36,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:36,189 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:03:36,189 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 20:03:36,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:36,199 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 20:03:36,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:36,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:36,219 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 20:03:36,230 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:03:36,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:36,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:36,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:03:36,502 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-16 20:03:36,503 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 523 treesize of output 583 [2022-11-16 20:03:36,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:03:36,531 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 320 treesize of output 310 [2022-11-16 20:03:37,772 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:03:37,815 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-16 20:03:37,816 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 743 treesize of output 704 [2022-11-16 20:03:37,855 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 20:03:37,856 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 704 treesize of output 694 [2022-11-16 20:03:37,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:37,898 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 20:03:37,915 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:03:37,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:37,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:37,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:03:37,933 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 20:03:38,045 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 20:03:38,056 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 20:03:38,151 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:03:38,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5270#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 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) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:03:38,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:03:38,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:03:38,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 191 [2022-11-16 20:03:38,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182087067] [2022-11-16 20:03:38,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:03:38,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-11-16 20:03:38,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:03:38,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-11-16 20:03:38,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18352, Invalid=20260, Unknown=0, NotChecked=0, Total=38612 [2022-11-16 20:03:38,930 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 20:03:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:03:39,862 INFO L93 Difference]: Finished difference Result 290 states and 387 transitions. [2022-11-16 20:03:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-16 20:03:39,863 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 20:03:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:03:39,865 INFO L225 Difference]: With dead ends: 290 [2022-11-16 20:03:39,865 INFO L226 Difference]: Without dead ends: 241 [2022-11-16 20:03:39,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=18352, Invalid=20260, Unknown=0, NotChecked=0, Total=38612 [2022-11-16 20:03:39,869 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:03:39,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 42 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:03:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-16 20:03:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-11-16 20:03:39,918 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 20:03:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2022-11-16 20:03:39,920 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 144 [2022-11-16 20:03:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:03:39,920 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2022-11-16 20:03:39,921 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 20:03:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2022-11-16 20:03:39,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-16 20:03:39,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:03:39,925 INFO L195 NwaCegarLoop]: trace histogram [190, 16, 15, 15, 1, 1, 1, 1] [2022-11-16 20:03:39,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 20:03:40,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 20:03:40,135 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:03:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:03:40,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1960778974, now seen corresponding path program 10 times [2022-11-16 20:03:40,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:03:40,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145402985] [2022-11-16 20:03:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:03:40,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:03:40,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:03:40,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938477956] [2022-11-16 20:03:40,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:03:40,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:03:40,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:03:40,266 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:03:40,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 20:03:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:03:41,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 2092 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-16 20:03:41,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:03:59,210 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 20:03:59,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:04:50,617 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 20:04:50,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:04:50,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145402985] [2022-11-16 20:04:50,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:04:50,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938477956] [2022-11-16 20:04:50,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938477956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:04:50,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [381855862] [2022-11-16 20:04:50,620 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 20:04:50,620 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:04:50,620 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:04:50,620 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:04:50,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:04:50,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:04:50,658 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-16 20:04:50,658 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 20:04:50,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:04:50,695 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:04:50,695 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 20:04:50,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:04:50,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:04:50,723 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 20:04:50,734 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:04:50,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:04:50,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:04:50,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:04:50,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:04:50,903 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-16 20:04:50,904 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 523 treesize of output 583 [2022-11-16 20:04:50,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:04:50,939 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 320 treesize of output 310 [2022-11-16 20:04:51,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:04:51,316 INFO L321 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-11-16 20:04:51,317 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 396 treesize of output 378 [2022-11-16 20:04:51,379 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 9 treesize of output 7 [2022-11-16 20:04:51,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:04:51,466 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 361 treesize of output 348 [2022-11-16 20:04:51,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:04:51,669 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-16 20:04:51,669 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 396 treesize of output 383 [2022-11-16 20:04:51,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:04:51,726 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 361 treesize of output 358 [2022-11-16 20:04:51,988 INFO L321 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2022-11-16 20:04:51,989 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 351 treesize of output 331 [2022-11-16 20:04:52,052 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 321 treesize of output 315 [2022-11-16 20:04:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:04:52,124 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 326 treesize of output 315 [2022-11-16 20:04:52,966 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 20:04:52,973 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 20:04:53,056 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:04:54,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8054#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 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) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:04:54,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:04:54,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:04:54,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192] total 383 [2022-11-16 20:04:54,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63170612] [2022-11-16 20:04:54,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:04:54,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2022-11-16 20:04:54,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:04:54,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2022-11-16 20:04:54,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73552, Invalid=77380, Unknown=0, NotChecked=0, Total=150932 [2022-11-16 20:04:54,326 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 20:04:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:04:57,235 INFO L93 Difference]: Finished difference Result 482 states and 675 transitions. [2022-11-16 20:04:57,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-16 20:04:57,236 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 20:04:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:04:57,239 INFO L225 Difference]: With dead ends: 482 [2022-11-16 20:04:57,239 INFO L226 Difference]: Without dead ends: 433 [2022-11-16 20:04:57,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2858 ImplicationChecksByTransitivity, 69.5s TimeCoverageRelationStatistics Valid=73552, Invalid=77380, Unknown=0, NotChecked=0, Total=150932 [2022-11-16 20:04:57,249 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:04:57,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 20:04:57,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-16 20:04:57,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2022-11-16 20:04:57,306 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 20:04:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 434 transitions. [2022-11-16 20:04:57,307 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 434 transitions. Word has length 240 [2022-11-16 20:04:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:04:57,308 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 434 transitions. [2022-11-16 20:04:57,309 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 20:04:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 434 transitions. [2022-11-16 20:04:57,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-11-16 20:04:57,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:04:57,317 INFO L195 NwaCegarLoop]: trace histogram [382, 16, 15, 15, 1, 1, 1, 1] [2022-11-16 20:04:57,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 20:04:57,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 20:04:57,531 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:04:57,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:04:57,531 INFO L85 PathProgramCache]: Analyzing trace with hash 357638366, now seen corresponding path program 11 times [2022-11-16 20:04:57,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:04:57,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406471550] [2022-11-16 20:04:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:04:57,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:04:57,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:04:57,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975810162] [2022-11-16 20:04:57,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:04:57,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:04:57,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:04:57,786 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:04:57,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 20:07:37,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-16 20:07:37,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:07:37,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 20:07:37,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:07:40,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:07:40,980 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 20:07:41,032 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 20:07:41,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:07:51,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:07:51,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 271 treesize of output 395 [2022-11-16 20:08:24,264 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 20:08:24,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:08:24,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406471550] [2022-11-16 20:08:24,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:08:24,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975810162] [2022-11-16 20:08:24,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975810162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:08:24,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876961464] [2022-11-16 20:08:24,267 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 20:08:24,267 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:08:24,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:08:24,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:08:24,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:08:24,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:24,309 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:08:24,310 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 20:08:24,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:24,320 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 20:08:24,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:24,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:24,343 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 20:08:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:08:24,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 72 [2022-11-16 20:08:24,379 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 20:08:24,406 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 20:08:24,414 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 20:08:24,528 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:08:25,163 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12414#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 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) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:08:25,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:08:25,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:08:25,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2022-11-16 20:08:25,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507390681] [2022-11-16 20:08:25,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:08:25,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 20:08:25,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:08:25,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 20:08:25,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=1375, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 20:08:25,165 INFO L87 Difference]: Start difference. First operand 433 states and 434 transitions. Second operand has 40 states, 40 states have (on average 2.525) internal successors, (101), 39 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 20:08:37,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:08:37,921 INFO L93 Difference]: Finished difference Result 483 states and 499 transitions. [2022-11-16 20:08:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 20:08:37,922 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 39 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 20:08:37,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:08:37,924 INFO L225 Difference]: With dead ends: 483 [2022-11-16 20:08:37,924 INFO L226 Difference]: Without dead ends: 481 [2022-11-16 20:08:37,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1336 GetRequests, 1251 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=2444, Invalid=5038, Unknown=0, NotChecked=0, Total=7482 [2022-11-16 20:08:37,926 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:08:37,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-11-16 20:08:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-11-16 20:08:37,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 481. [2022-11-16 20:08:37,996 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 20:08:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 482 transitions. [2022-11-16 20:08:37,998 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 482 transitions. Word has length 432 [2022-11-16 20:08:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:08:37,999 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 482 transitions. [2022-11-16 20:08:37,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 39 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 20:08:37,999 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 482 transitions. [2022-11-16 20:08:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2022-11-16 20:08:38,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:08:38,010 INFO L195 NwaCegarLoop]: trace histogram [382, 32, 31, 31, 1, 1, 1, 1] [2022-11-16 20:08:38,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 20:08:38,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:08:38,227 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:08:38,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:08:38,228 INFO L85 PathProgramCache]: Analyzing trace with hash 519571678, now seen corresponding path program 12 times [2022-11-16 20:08:38,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:08:38,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140875766] [2022-11-16 20:08:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:08:38,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:08:38,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:08:38,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507360323] [2022-11-16 20:08:38,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:08:38,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:08:38,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:08:38,481 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:08:38,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 20:08:40,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:08:40,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:08:40,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 4156 conjuncts, 385 conjunts are in the unsatisfiable core [2022-11-16 20:08:40,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:09:52,310 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 20:09:52,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:13:47,672 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 20:13:47,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:13:47,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140875766] [2022-11-16 20:13:47,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:13:47,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507360323] [2022-11-16 20:13:47,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507360323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:13:47,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [187622992] [2022-11-16 20:13:47,675 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 20:13:47,676 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:13:47,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:13:47,676 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:13:47,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:13:47,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:47,718 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-16 20:13:47,719 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 20:13:47,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:47,765 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:13:47,766 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 20:13:47,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:47,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:47,792 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 20:13:47,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:47,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:13:47,826 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 55 treesize of output 46 [2022-11-16 20:13:47,834 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 20:13:47,868 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 20:13:47,878 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 20:13:48,002 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:13:50,944 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17939#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 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) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:13:50,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:13:50,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:13:50,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384] total 767 [2022-11-16 20:13:50,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787567777] [2022-11-16 20:13:50,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:13:50,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2022-11-16 20:13:50,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:13:50,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2022-11-16 20:13:51,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294544, Invalid=302212, Unknown=0, NotChecked=0, Total=596756 [2022-11-16 20:13:51,034 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 20:14:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:14:06,246 INFO L93 Difference]: Finished difference Result 962 states and 1347 transitions. [2022-11-16 20:14:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-11-16 20:14:06,248 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 20:14:06,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:14:06,253 INFO L225 Difference]: With dead ends: 962 [2022-11-16 20:14:06,253 INFO L226 Difference]: Without dead ends: 865 [2022-11-16 20:14:06,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1438 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 771 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5738 ImplicationChecksByTransitivity, 308.0s TimeCoverageRelationStatistics Valid=294544, Invalid=302212, Unknown=0, NotChecked=0, Total=596756 [2022-11-16 20:14:06,307 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:14:06,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-16 20:14:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-11-16 20:14:06,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 865. [2022-11-16 20:14:06,446 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 20:14:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 866 transitions. [2022-11-16 20:14:06,450 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 866 transitions. Word has length 480 [2022-11-16 20:14:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:14:06,451 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 866 transitions. [2022-11-16 20:14:06,452 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 20:14:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 866 transitions. [2022-11-16 20:14:06,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 865 [2022-11-16 20:14:06,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:14:06,463 INFO L195 NwaCegarLoop]: trace histogram [766, 32, 31, 31, 1, 1, 1, 1] [2022-11-16 20:14:06,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 20:14:06,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 20:14:06,671 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:14:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:14:06,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1905004766, now seen corresponding path program 13 times [2022-11-16 20:14:06,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:14:06,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924946248] [2022-11-16 20:14:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:14:06,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:14:07,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:14:07,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964321764] [2022-11-16 20:14:07,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:14:07,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:14:07,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:14:07,266 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:14:07,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aed2e0f8-aae4-4398-8250-4aac3e7ce088/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 20:14:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:14:12,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 7996 conjuncts, 769 conjunts are in the unsatisfiable core [2022-11-16 20:14:12,490 INFO L286 TraceCheckSpWp]: Computing forward predicates...