./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta --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 54df2940ae4d13c219208dbc33c051105041923e87e99fc1d1620ede83e75392 --- 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-dbf71c6-m [2022-10-17 17:40:02,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:40:02,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:40:02,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:40:02,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:40:02,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:40:02,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:40:02,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:40:02,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:40:02,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:40:02,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:40:02,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:40:02,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:40:02,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:40:02,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:40:02,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:40:02,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:40:02,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:40:02,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:40:02,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:40:02,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:40:02,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:40:02,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:40:02,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:40:02,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:40:02,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:40:02,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:40:02,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:40:02,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:40:02,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:40:02,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:40:02,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:40:02,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:40:02,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:40:02,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:40:02,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:40:02,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:40:02,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:40:02,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:40:02,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:40:02,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:40:02,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:40:02,474 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:40:02,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:40:02,475 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:40:02,475 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:40:02,476 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:40:02,476 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:40:02,476 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:40:02,477 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:40:02,477 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:40:02,477 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:40:02,477 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:40:02,478 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:40:02,478 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:40:02,478 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:40:02,478 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:40:02,479 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:40:02,479 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:40:02,479 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:40:02,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:40:02,480 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:40:02,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:40:02,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:40:02,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:40:02,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:40:02,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:40:02,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:40:02,482 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:40:02,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:40:02,483 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:40:02,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:40:02,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:40:02,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:40:02,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:40:02,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:40:02,484 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:40:02,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:40:02,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:40:02,485 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:40:02,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:40:02,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:40:02,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:40:02,486 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_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54df2940ae4d13c219208dbc33c051105041923e87e99fc1d1620ede83e75392 [2022-10-17 17:40:02,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:40:02,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:40:02,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:40:02,841 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:40:02,842 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:40:02,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c [2022-10-17 17:40:02,917 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/data/b4ec73d0b/ae7393b606534cc9a7d87ffbfd7e1fb4/FLAG9b4013001 [2022-10-17 17:40:03,445 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:40:03,446 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c [2022-10-17 17:40:03,454 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/data/b4ec73d0b/ae7393b606534cc9a7d87ffbfd7e1fb4/FLAG9b4013001 [2022-10-17 17:40:03,797 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/data/b4ec73d0b/ae7393b606534cc9a7d87ffbfd7e1fb4 [2022-10-17 17:40:03,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:40:03,802 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:40:03,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:40:03,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:40:03,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:40:03,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:40:03" (1/1) ... [2022-10-17 17:40:03,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37f2feeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:03, skipping insertion in model container [2022-10-17 17:40:03,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:40:03" (1/1) ... [2022-10-17 17:40:03,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:40:03,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:40:04,046 WARN L230 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_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c[424,437] [2022-10-17 17:40:04,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:40:04,073 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:40:04,084 WARN L230 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_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c[424,437] [2022-10-17 17:40:04,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:40:04,104 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:40:04,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:04 WrapperNode [2022-10-17 17:40:04,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:40:04,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:40:04,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:40:04,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:40:04,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:04" (1/1) ... [2022-10-17 17:40:04,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:04" (1/1) ... [2022-10-17 17:40:04,157 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-10-17 17:40:04,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:40:04,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:40:04,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:40:04,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:40:04,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:04" (1/1) ... [2022-10-17 17:40:04,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:04" (1/1) ... [2022-10-17 17:40:04,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:04" (1/1) ... [2022-10-17 17:40:04,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:04" (1/1) ... [2022-10-17 17:40:04,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:04" (1/1) ... [2022-10-17 17:40:04,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:04" (1/1) ... [2022-10-17 17:40:04,185 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:04" (1/1) ... [2022-10-17 17:40:04,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:04" (1/1) ... [2022-10-17 17:40:04,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:40:04,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:40:04,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:40:04,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:40:04,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:04" (1/1) ... [2022-10-17 17:40:04,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:40:04,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:04,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:40:04,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:40:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:40:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:40:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:40:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:40:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:40:04,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:40:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:40:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:40:04,358 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:40:04,361 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:40:04,614 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:40:04,735 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:40:04,735 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 17:40:04,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:40:04 BoogieIcfgContainer [2022-10-17 17:40:04,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:40:04,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:40:04,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:40:04,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:40:04,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:40:03" (1/3) ... [2022-10-17 17:40:04,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437c7cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:40:04, skipping insertion in model container [2022-10-17 17:40:04,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:40:04" (2/3) ... [2022-10-17 17:40:04,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437c7cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:40:04, skipping insertion in model container [2022-10-17 17:40:04,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:40:04" (3/3) ... [2022-10-17 17:40:04,766 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_both_ends_multiple_sum.c [2022-10-17 17:40:04,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:40:04,789 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:40:04,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:40:04,859 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;@187c08dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:40:04,859 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:40:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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) [2022-10-17 17:40:04,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 17:40:04,871 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:04,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 17:40:04,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:04,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:04,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1566730996, now seen corresponding path program 1 times [2022-10-17 17:40:04,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:04,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764557798] [2022-10-17 17:40:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:04,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:40:05,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:05,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764557798] [2022-10-17 17:40:05,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764557798] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:05,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:05,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:40:05,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116339980] [2022-10-17 17:40:05,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:05,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:40:05,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:05,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:40:05,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:40:05,349 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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 2.0) internal successors, (6), 2 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) [2022-10-17 17:40:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:05,416 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-10-17 17:40:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:40:05,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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 [2022-10-17 17:40:05,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:05,431 INFO L225 Difference]: With dead ends: 17 [2022-10-17 17:40:05,431 INFO L226 Difference]: Without dead ends: 8 [2022-10-17 17:40:05,435 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 [2022-10-17 17:40:05,446 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:05,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:40:05,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-10-17 17:40:05,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-10-17 17:40:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.4285714285714286) 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) [2022-10-17 17:40:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2022-10-17 17:40:05,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 6 [2022-10-17 17:40:05,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:05,493 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2022-10-17 17:40:05,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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) [2022-10-17 17:40:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2022-10-17 17:40:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:40:05,496 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:05,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:05,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:40:05,497 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:05,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:05,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1606658421, now seen corresponding path program 1 times [2022-10-17 17:40:05,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:05,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433966376] [2022-10-17 17:40:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:05,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:40:05,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:05,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433966376] [2022-10-17 17:40:05,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433966376] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:05,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:05,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:40:05,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432071373] [2022-10-17 17:40:05,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:05,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:40:05,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:05,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:40:05,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:40:05,662 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-10-17 17:40:05,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:05,710 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2022-10-17 17:40:05,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:40:05,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2022-10-17 17:40:05,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:05,712 INFO L225 Difference]: With dead ends: 14 [2022-10-17 17:40:05,712 INFO L226 Difference]: Without dead ends: 10 [2022-10-17 17:40:05,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:40:05,715 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:05,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 4 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:40:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-10-17 17:40:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-10-17 17:40:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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) [2022-10-17 17:40:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-10-17 17:40:05,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-10-17 17:40:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:05,722 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-10-17 17:40:05,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-10-17 17:40:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-10-17 17:40:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:40:05,723 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:05,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:05,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:40:05,726 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:05,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:05,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2073466838, now seen corresponding path program 1 times [2022-10-17 17:40:05,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:05,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344206528] [2022-10-17 17:40:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:05,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:40:05,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:05,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344206528] [2022-10-17 17:40:05,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344206528] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:40:05,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288207361] [2022-10-17 17:40:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:05,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:05,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:05,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:05,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:40:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:05,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:40:05,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:40:06,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:40:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:40:06,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288207361] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:40:06,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554213281] [2022-10-17 17:40:06,117 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-10-17 17:40:06,118 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:40:06,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:40:06,129 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:40:06,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:40:06,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:06,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:06,298 INFO L356 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2022-10-17 17:40:06,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 53 [2022-10-17 17:40:06,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:06,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:06,430 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-10-17 17:40:06,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-10-17 17:40:06,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:06,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-10-17 17:40:06,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:06,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:40:06,778 INFO L356 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2022-10-17 17:40:06,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 291 treesize of output 294 [2022-10-17 17:40:07,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 18 treesize of output 14 [2022-10-17 17:40:07,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2022-10-17 17:40:07,207 INFO L356 Elim1Store]: treesize reduction 22, result has 45.0 percent of original size [2022-10-17 17:40:07,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 83 [2022-10-17 17:40:07,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-17 17:40:07,393 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:40:07,671 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '149#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-10-17 17:40:07,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:40:07,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:40:07,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-10-17 17:40:07,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280399501] [2022-10-17 17:40:07,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:40:07,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:40:07,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:07,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:40:07,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:40:07,675 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-10-17 17:40:07,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:07,716 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-10-17 17:40:07,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:40:07,717 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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 [2022-10-17 17:40:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:07,717 INFO L225 Difference]: With dead ends: 20 [2022-10-17 17:40:07,717 INFO L226 Difference]: Without dead ends: 13 [2022-10-17 17:40:07,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:40:07,720 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:07,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:40:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-10-17 17:40:07,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-10-17 17:40:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2022-10-17 17:40:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-10-17 17:40:07,725 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2022-10-17 17:40:07,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:07,725 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-10-17 17:40:07,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-10-17 17:40:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-10-17 17:40:07,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:40:07,726 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:07,726 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:07,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:07,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:07,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:07,928 INFO L85 PathProgramCache]: Analyzing trace with hash 866857431, now seen corresponding path program 2 times [2022-10-17 17:40:07,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:07,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278576381] [2022-10-17 17:40:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:07,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 17:40:08,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:08,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278576381] [2022-10-17 17:40:08,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278576381] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:40:08,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046665048] [2022-10-17 17:40:08,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:40:08,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:08,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:08,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:08,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:40:08,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:40:08,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:40:08,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:40:08,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 17:40:08,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:40:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 17:40:08,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046665048] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:40:08,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [580776870] [2022-10-17 17:40:08,232 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-10-17 17:40:08,233 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:40:08,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:40:08,236 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:40:08,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:40:08,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:08,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:08,364 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-10-17 17:40:08,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-10-17 17:40:08,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:08,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:08,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-10-17 17:40:08,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:08,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-10-17 17:40:08,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:08,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:40:08,566 INFO L356 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2022-10-17 17:40:08,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 291 treesize of output 294 [2022-10-17 17:40:08,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 18 treesize of output 14 [2022-10-17 17:40:08,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2022-10-17 17:40:08,811 INFO L356 Elim1Store]: treesize reduction 22, result has 45.0 percent of original size [2022-10-17 17:40:08,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 83 [2022-10-17 17:40:08,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-17 17:40:08,952 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:40:09,132 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '284#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-10-17 17:40:09,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:40:09,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:40:09,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-10-17 17:40:09,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564390247] [2022-10-17 17:40:09,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:40:09,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 17:40:09,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:09,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 17:40:09,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:40:09,135 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:40:09,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:09,253 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2022-10-17 17:40:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:40:09,253 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-17 17:40:09,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:09,254 INFO L225 Difference]: With dead ends: 24 [2022-10-17 17:40:09,254 INFO L226 Difference]: Without dead ends: 19 [2022-10-17 17:40:09,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-10-17 17:40:09,256 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:09,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:40:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-10-17 17:40:09,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-10-17 17:40:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2022-10-17 17:40:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-10-17 17:40:09,263 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-10-17 17:40:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:09,263 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-10-17 17:40:09,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:40:09,264 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-10-17 17:40:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 17:40:09,265 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:09,265 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:09,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:09,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:09,466 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:09,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:09,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1509939700, now seen corresponding path program 3 times [2022-10-17 17:40:09,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:09,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882608209] [2022-10-17 17:40:09,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:09,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 17:40:09,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:09,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882608209] [2022-10-17 17:40:09,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882608209] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:40:09,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297982210] [2022-10-17 17:40:09,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:40:09,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:09,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:09,630 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:09,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:40:09,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 17:40:09,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:40:09,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:40:09,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 17:40:09,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:40:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 17:40:09,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297982210] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:40:09,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [453066925] [2022-10-17 17:40:09,906 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-10-17 17:40:09,906 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:40:09,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:40:09,907 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:40:09,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:40:09,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:09,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:10,011 INFO L356 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2022-10-17 17:40:10,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 53 [2022-10-17 17:40:10,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:10,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:10,145 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-10-17 17:40:10,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-10-17 17:40:10,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:10,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2022-10-17 17:40:10,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:10,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:10,330 INFO L356 Elim1Store]: treesize reduction 51, result has 12.1 percent of original size [2022-10-17 17:40:10,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 298 treesize of output 295 [2022-10-17 17:40:10,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 18 treesize of output 14 [2022-10-17 17:40:10,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2022-10-17 17:40:10,475 INFO L356 Elim1Store]: treesize reduction 22, result has 45.0 percent of original size [2022-10-17 17:40:10,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 83 [2022-10-17 17:40:10,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-17 17:40:10,597 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:40:10,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '487#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-10-17 17:40:10,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:40:10,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:40:10,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-10-17 17:40:10,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336363854] [2022-10-17 17:40:10,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:40:10,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 17:40:10,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:10,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 17:40:10,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2022-10-17 17:40:10,882 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 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) [2022-10-17 17:40:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:11,120 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2022-10-17 17:40:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 17:40:11,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 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 [2022-10-17 17:40:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:11,125 INFO L225 Difference]: With dead ends: 50 [2022-10-17 17:40:11,125 INFO L226 Difference]: Without dead ends: 37 [2022-10-17 17:40:11,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2022-10-17 17:40:11,131 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:11,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:40:11,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-10-17 17:40:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-10-17 17:40:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 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) [2022-10-17 17:40:11,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-10-17 17:40:11,147 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 18 [2022-10-17 17:40:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:11,147 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-10-17 17:40:11,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 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) [2022-10-17 17:40:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-10-17 17:40:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-17 17:40:11,152 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:11,153 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:11,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:11,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:11,380 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:11,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:11,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1736480884, now seen corresponding path program 4 times [2022-10-17 17:40:11,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:11,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250745229] [2022-10-17 17:40:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:11,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-10-17 17:40:11,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:11,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250745229] [2022-10-17 17:40:11,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250745229] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:40:11,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988082393] [2022-10-17 17:40:11,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 17:40:11,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:11,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:11,832 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:11,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:40:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:11,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 17:40:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-10-17 17:40:12,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:40:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-10-17 17:40:12,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988082393] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:40:12,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278230294] [2022-10-17 17:40:12,387 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-10-17 17:40:12,387 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:40:12,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:40:12,388 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:40:12,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:40:12,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:12,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:12,480 INFO L356 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2022-10-17 17:40:12,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 53 [2022-10-17 17:40:12,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:12,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:12,572 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-10-17 17:40:12,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-10-17 17:40:12,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:12,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-10-17 17:40:12,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:12,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:40:12,750 INFO L356 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2022-10-17 17:40:12,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 291 treesize of output 294 [2022-10-17 17:40:12,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 18 treesize of output 14 [2022-10-17 17:40:12,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-17 17:40:12,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 82 [2022-10-17 17:40:12,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-17 17:40:13,020 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:40:13,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '910#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-10-17 17:40:13,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:40:13,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:40:13,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2022-10-17 17:40:13,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753667494] [2022-10-17 17:40:13,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:40:13,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-10-17 17:40:13,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:13,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-10-17 17:40:13,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=980, Unknown=0, NotChecked=0, Total=1560 [2022-10-17 17:40:13,511 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 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) [2022-10-17 17:40:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:14,102 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-10-17 17:40:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-10-17 17:40:14,103 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 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 [2022-10-17 17:40:14,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:14,104 INFO L225 Difference]: With dead ends: 98 [2022-10-17 17:40:14,104 INFO L226 Difference]: Without dead ends: 73 [2022-10-17 17:40:14,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 70 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=866, Invalid=1684, Unknown=0, NotChecked=0, Total=2550 [2022-10-17 17:40:14,107 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:14,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:40:14,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-17 17:40:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-10-17 17:40:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 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) [2022-10-17 17:40:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-10-17 17:40:14,121 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 36 [2022-10-17 17:40:14,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:14,122 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-10-17 17:40:14,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 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) [2022-10-17 17:40:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-10-17 17:40:14,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-10-17 17:40:14,125 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:14,125 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:14,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:14,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:14,340 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:14,340 INFO L85 PathProgramCache]: Analyzing trace with hash -815334772, now seen corresponding path program 5 times [2022-10-17 17:40:14,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:14,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235862997] [2022-10-17 17:40:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:14,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-10-17 17:40:15,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:15,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235862997] [2022-10-17 17:40:15,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235862997] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:40:15,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555741547] [2022-10-17 17:40:15,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:40:15,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:15,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:15,476 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:15,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:40:25,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-10-17 17:40:25,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:40:25,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-17 17:40:25,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-10-17 17:40:25,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:40:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-10-17 17:40:26,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555741547] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:40:26,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1772906763] [2022-10-17 17:40:26,865 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-10-17 17:40:26,865 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:40:26,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:40:26,865 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:40:26,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:40:26,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:26,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:26,963 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-10-17 17:40:26,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-10-17 17:40:26,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:26,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:26,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-10-17 17:40:27,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:27,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2022-10-17 17:40:27,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:27,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:40:27,097 INFO L356 Elim1Store]: treesize reduction 51, result has 12.1 percent of original size [2022-10-17 17:40:27,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 298 treesize of output 295 [2022-10-17 17:40:27,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 18 treesize of output 14 [2022-10-17 17:40:27,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-17 17:40:27,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 82 [2022-10-17 17:40:27,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-17 17:40:27,347 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:40:28,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1766#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-10-17 17:40:28,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:40:28,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:40:28,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2022-10-17 17:40:28,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398850252] [2022-10-17 17:40:28,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:40:28,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-10-17 17:40:28,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:28,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-10-17 17:40:28,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2327, Invalid=3525, Unknown=0, NotChecked=0, Total=5852 [2022-10-17 17:40:28,347 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 73 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 72 states have internal predecessors, (82), 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) [2022-10-17 17:40:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:29,803 INFO L93 Difference]: Finished difference Result 194 states and 269 transitions. [2022-10-17 17:40:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-10-17 17:40:29,804 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 72 states have internal predecessors, (82), 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 [2022-10-17 17:40:29,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:29,806 INFO L225 Difference]: With dead ends: 194 [2022-10-17 17:40:29,806 INFO L226 Difference]: Without dead ends: 145 [2022-10-17 17:40:29,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 141 SyntacticMatches, 23 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6346 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3500, Invalid=6400, Unknown=0, NotChecked=0, Total=9900 [2022-10-17 17:40:29,811 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:29,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:40:29,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-10-17 17:40:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-10-17 17:40:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 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) [2022-10-17 17:40:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2022-10-17 17:40:29,835 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 72 [2022-10-17 17:40:29,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:29,836 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2022-10-17 17:40:29,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 72 states have internal predecessors, (82), 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) [2022-10-17 17:40:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2022-10-17 17:40:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-10-17 17:40:29,839 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:29,839 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:29,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:30,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:30,052 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:30,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:30,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1708810380, now seen corresponding path program 6 times [2022-10-17 17:40:30,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:30,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325197324] [2022-10-17 17:40:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:30,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-10-17 17:40:33,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:33,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325197324] [2022-10-17 17:40:33,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325197324] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:40:33,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465223858] [2022-10-17 17:40:33,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:40:33,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:33,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:33,433 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:33,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f11e23-c1b5-4fb0-b6b6-9d49bb989216/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process