./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/zonotope_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/zonotope_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh --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 c1619194307da84227512f62eb582bffd66266544ce804bd80ee6a40fe157ac7 --- 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-2329fc7 [2022-12-14 09:24:37,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:24:37,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:24:37,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:24:37,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:24:37,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:24:37,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:24:37,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:24:37,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:24:37,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:24:37,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:24:37,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:24:37,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:24:37,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:24:37,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:24:37,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:24:37,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:24:37,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:24:37,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:24:37,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:24:37,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:24:37,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:24:37,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:24:37,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:24:37,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:24:37,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:24:37,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:24:37,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:24:37,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:24:37,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:24:37,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:24:37,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:24:37,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:24:37,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:24:37,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:24:37,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:24:37,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:24:37,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:24:37,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:24:37,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:24:37,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:24:37,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:24:37,531 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:24:37,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:24:37,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:24:37,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:24:37,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:24:37,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:24:37,533 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:24:37,533 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:24:37,533 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:24:37,533 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:24:37,533 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:24:37,533 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:24:37,534 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:24:37,534 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:24:37,534 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:24:37,534 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:24:37,534 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:24:37,535 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:24:37,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:24:37,535 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:24:37,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:24:37,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:24:37,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:24:37,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:24:37,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:24:37,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:24:37,536 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:24:37,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:24:37,537 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:24:37,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:24:37,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:24:37,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:24:37,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:24:37,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:24:37,538 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:24:37,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:24:37,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:24:37,538 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:24:37,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:24:37,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:24:37,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:24:37,539 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_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1619194307da84227512f62eb582bffd66266544ce804bd80ee6a40fe157ac7 [2022-12-14 09:24:37,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:24:37,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:24:37,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:24:37,743 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:24:37,743 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:24:37,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/float-benchs/zonotope_3.c [2022-12-14 09:24:40,241 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:24:40,389 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:24:40,389 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/sv-benchmarks/c/float-benchs/zonotope_3.c [2022-12-14 09:24:40,393 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/data/e4fb6b624/1cfe3c6c625b48cab60c8b711d34c00a/FLAG44b783234 [2022-12-14 09:24:40,813 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/data/e4fb6b624/1cfe3c6c625b48cab60c8b711d34c00a [2022-12-14 09:24:40,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:24:40,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:24:40,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:24:40,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:24:40,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:24:40,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:24:40" (1/1) ... [2022-12-14 09:24:40,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e221eee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:40, skipping insertion in model container [2022-12-14 09:24:40,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:24:40" (1/1) ... [2022-12-14 09:24:40,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:24:40,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:24:40,941 WARN L237 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_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/sv-benchmarks/c/float-benchs/zonotope_3.c[604,617] [2022-12-14 09:24:40,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:24:40,959 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:24:40,967 WARN L237 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_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/sv-benchmarks/c/float-benchs/zonotope_3.c[604,617] [2022-12-14 09:24:40,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:24:40,979 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:24:40,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:40 WrapperNode [2022-12-14 09:24:40,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:24:40,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:24:40,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:24:40,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:24:40,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:40" (1/1) ... [2022-12-14 09:24:40,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:40" (1/1) ... [2022-12-14 09:24:41,003 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2022-12-14 09:24:41,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:24:41,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:24:41,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:24:41,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:24:41,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:40" (1/1) ... [2022-12-14 09:24:41,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:40" (1/1) ... [2022-12-14 09:24:41,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:40" (1/1) ... [2022-12-14 09:24:41,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:40" (1/1) ... [2022-12-14 09:24:41,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:40" (1/1) ... [2022-12-14 09:24:41,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:40" (1/1) ... [2022-12-14 09:24:41,016 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:40" (1/1) ... [2022-12-14 09:24:41,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:40" (1/1) ... [2022-12-14 09:24:41,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:24:41,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:24:41,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:24:41,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:24:41,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:40" (1/1) ... [2022-12-14 09:24:41,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:24:41,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:41,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:24:41,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:24:41,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:24:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-12-14 09:24:41,077 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-12-14 09:24:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure g [2022-12-14 09:24:41,077 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2022-12-14 09:24:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:24:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:24:41,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:24:41,132 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:24:41,133 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:24:41,228 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:24:41,277 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:24:41,277 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 09:24:41,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:24:41 BoogieIcfgContainer [2022-12-14 09:24:41,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:24:41,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:24:41,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:24:41,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:24:41,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:24:40" (1/3) ... [2022-12-14 09:24:41,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48907e6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:24:41, skipping insertion in model container [2022-12-14 09:24:41,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:24:40" (2/3) ... [2022-12-14 09:24:41,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48907e6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:24:41, skipping insertion in model container [2022-12-14 09:24:41,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:24:41" (3/3) ... [2022-12-14 09:24:41,289 INFO L112 eAbstractionObserver]: Analyzing ICFG zonotope_3.c [2022-12-14 09:24:41,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:24:41,315 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:24:41,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:24:41,371 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;@71c38976, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:24:41,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:24:41,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 09:24:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 09:24:41,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:41,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:41,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:24:41,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:41,387 INFO L85 PathProgramCache]: Analyzing trace with hash -377860736, now seen corresponding path program 1 times [2022-12-14 09:24:41,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:24:41,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735591528] [2022-12-14 09:24:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:41,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:24:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 09:24:41,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:24:41,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735591528] [2022-12-14 09:24:41,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735591528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:24:41,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:24:41,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:24:41,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143835636] [2022-12-14 09:24:41,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:24:41,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:24:41,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:24:41,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:24:41,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:24:41,601 INFO L87 Difference]: Start difference. First operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 09:24:41,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:41,637 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-12-14 09:24:41,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:24:41,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2022-12-14 09:24:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:41,644 INFO L225 Difference]: With dead ends: 41 [2022-12-14 09:24:41,645 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 09:24:41,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:24:41,649 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:41,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 55 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:24:41,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 09:24:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-12-14 09:24:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 09:24:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-12-14 09:24:41,680 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2022-12-14 09:24:41,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:41,680 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-12-14 09:24:41,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 09:24:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-12-14 09:24:41,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 09:24:41,682 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:41,682 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:41,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:24:41,682 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:24:41,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:41,683 INFO L85 PathProgramCache]: Analyzing trace with hash 647802699, now seen corresponding path program 1 times [2022-12-14 09:24:41,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:24:41,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792080932] [2022-12-14 09:24:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:41,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:24:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 09:24:41,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:24:41,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792080932] [2022-12-14 09:24:41,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792080932] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:24:41,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945167038] [2022-12-14 09:24:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:41,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:41,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:41,774 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:41,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:24:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:41,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:24:41,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 09:24:41,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 09:24:41,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945167038] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:41,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [959594830] [2022-12-14 09:24:41,977 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 09:24:41,977 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:24:41,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:24:41,985 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:24:41,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:24:42,960 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 8 for LOIs [2022-12-14 09:24:42,961 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 8 for LOIs [2022-12-14 09:24:42,962 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:24:43,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '353#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 100000 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 09:24:43,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:24:43,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:24:43,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 09:24:43,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803814519] [2022-12-14 09:24:43,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:24:43,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 09:24:43,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:24:43,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 09:24:43,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:24:43,172 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 09:24:43,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:43,234 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2022-12-14 09:24:43,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:24:43,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 37 [2022-12-14 09:24:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:43,236 INFO L225 Difference]: With dead ends: 56 [2022-12-14 09:24:43,236 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 09:24:43,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:24:43,238 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:43,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 117 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:24:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 09:24:43,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-14 09:24:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 09:24:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2022-12-14 09:24:43,249 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 37 [2022-12-14 09:24:43,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:43,249 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2022-12-14 09:24:43,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 09:24:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2022-12-14 09:24:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 09:24:43,252 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:43,252 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:43,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:24:43,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 09:24:43,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:24:43,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:43,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1813992512, now seen corresponding path program 2 times [2022-12-14 09:24:43,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:24:43,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199428380] [2022-12-14 09:24:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:43,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:24:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-12-14 09:24:43,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:24:43,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199428380] [2022-12-14 09:24:43,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199428380] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:24:43,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976138588] [2022-12-14 09:24:43,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:24:43,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:43,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:43,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:43,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:24:43,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 09:24:43,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:43,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:24:43,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-12-14 09:24:43,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-12-14 09:24:43,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976138588] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:43,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [669571889] [2022-12-14 09:24:43,989 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 09:24:43,989 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:24:43,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:24:43,989 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:24:43,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:24:44,641 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 8 for LOIs [2022-12-14 09:24:44,642 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 8 for LOIs [2022-12-14 09:24:44,643 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:24:44,844 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1059#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 100000 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 09:24:44,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:24:44,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:24:44,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-14 09:24:44,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134684513] [2022-12-14 09:24:44,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:24:44,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 09:24:44,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:24:44,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 09:24:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-12-14 09:24:44,848 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2022-12-14 09:24:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:44,954 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2022-12-14 09:24:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:24:44,954 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 88 [2022-12-14 09:24:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:44,956 INFO L225 Difference]: With dead ends: 110 [2022-12-14 09:24:44,956 INFO L226 Difference]: Without dead ends: 107 [2022-12-14 09:24:44,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-12-14 09:24:44,958 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:44,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 142 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:24:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-14 09:24:44,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-12-14 09:24:44,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 44 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-14 09:24:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 149 transitions. [2022-12-14 09:24:44,975 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 149 transitions. Word has length 88 [2022-12-14 09:24:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:44,976 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 149 transitions. [2022-12-14 09:24:44,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2022-12-14 09:24:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 149 transitions. [2022-12-14 09:24:44,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-12-14 09:24:44,980 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:44,980 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:44,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:24:45,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:45,181 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:24:45,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:45,182 INFO L85 PathProgramCache]: Analyzing trace with hash 853412448, now seen corresponding path program 3 times [2022-12-14 09:24:45,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:24:45,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983339748] [2022-12-14 09:24:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:45,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:24:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 415 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-12-14 09:24:45,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:24:45,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983339748] [2022-12-14 09:24:45,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983339748] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:24:45,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228093786] [2022-12-14 09:24:45,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:24:45,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:45,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:45,538 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:45,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:24:45,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:24:45,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:45,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 09:24:45,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 415 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-12-14 09:24:45,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 415 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-12-14 09:24:46,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228093786] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:46,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1769400337] [2022-12-14 09:24:46,031 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 09:24:46,031 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:24:46,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:24:46,032 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:24:46,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:24:46,609 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 8 for LOIs [2022-12-14 09:24:46,610 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 8 for LOIs [2022-12-14 09:24:46,611 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:24:46,773 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2557#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 100000 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 09:24:46,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:24:46,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:24:46,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-12-14 09:24:46,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442743975] [2022-12-14 09:24:46,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:24:46,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 09:24:46,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:24:46,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 09:24:46,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 09:24:46,777 INFO L87 Difference]: Start difference. First operand 107 states and 149 transitions. Second operand has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 22 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 22 states have call predecessors, (88), 22 states have call successors, (88) [2022-12-14 09:24:46,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:46,971 INFO L93 Difference]: Finished difference Result 218 states and 319 transitions. [2022-12-14 09:24:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 09:24:46,971 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 22 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 22 states have call predecessors, (88), 22 states have call successors, (88) Word has length 190 [2022-12-14 09:24:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:46,974 INFO L225 Difference]: With dead ends: 218 [2022-12-14 09:24:46,974 INFO L226 Difference]: Without dead ends: 215 [2022-12-14 09:24:46,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 09:24:46,976 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 8 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:46,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 260 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:24:46,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-12-14 09:24:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-12-14 09:24:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 92 states have call successors, (92), 2 states have call predecessors, (92), 2 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-14 09:24:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 305 transitions. [2022-12-14 09:24:47,003 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 305 transitions. Word has length 190 [2022-12-14 09:24:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:47,004 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 305 transitions. [2022-12-14 09:24:47,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 22 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 22 states have call predecessors, (88), 22 states have call successors, (88) [2022-12-14 09:24:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 305 transitions. [2022-12-14 09:24:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-12-14 09:24:47,012 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:47,013 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:47,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:24:47,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:47,214 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:24:47,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:47,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1979559584, now seen corresponding path program 4 times [2022-12-14 09:24:47,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:24:47,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938628527] [2022-12-14 09:24:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:47,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:24:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 2101 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2022-12-14 09:24:48,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:24:48,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938628527] [2022-12-14 09:24:48,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938628527] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:24:48,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391700657] [2022-12-14 09:24:48,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:24:48,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:48,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:48,062 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:48,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:24:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:48,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 09:24:48,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 2101 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2022-12-14 09:24:48,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 2101 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2022-12-14 09:24:49,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391700657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:49,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530256888] [2022-12-14 09:24:49,055 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 09:24:49,055 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:24:49,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:24:49,056 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:24:49,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:24:49,593 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 8 for LOIs [2022-12-14 09:24:49,593 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 8 for LOIs [2022-12-14 09:24:49,594 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:24:49,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5639#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 100000 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 09:24:49,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:24:49,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:24:49,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-12-14 09:24:49,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577811202] [2022-12-14 09:24:49,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:24:49,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 09:24:49,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:24:49,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 09:24:49,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=1987, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 09:24:49,801 INFO L87 Difference]: Start difference. First operand 215 states and 305 transitions. Second operand has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 46 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 46 states have call predecessors, (184), 46 states have call successors, (184) [2022-12-14 09:24:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:50,140 INFO L93 Difference]: Finished difference Result 434 states and 643 transitions. [2022-12-14 09:24:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 09:24:50,141 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 46 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 46 states have call predecessors, (184), 46 states have call successors, (184) Word has length 394 [2022-12-14 09:24:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:50,143 INFO L225 Difference]: With dead ends: 434 [2022-12-14 09:24:50,144 INFO L226 Difference]: Without dead ends: 431 [2022-12-14 09:24:50,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1205 GetRequests, 1150 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1205, Invalid=1987, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 09:24:50,145 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 8 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:50,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 391 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:24:50,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-12-14 09:24:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2022-12-14 09:24:50,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 240 states have (on average 1.0041666666666667) internal successors, (241), 240 states have internal predecessors, (241), 188 states have call successors, (188), 2 states have call predecessors, (188), 2 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2022-12-14 09:24:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 617 transitions. [2022-12-14 09:24:50,167 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 617 transitions. Word has length 394 [2022-12-14 09:24:50,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:50,168 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 617 transitions. [2022-12-14 09:24:50,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 46 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 46 states have call predecessors, (184), 46 states have call successors, (184) [2022-12-14 09:24:50,169 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 617 transitions. [2022-12-14 09:24:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2022-12-14 09:24:50,185 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:50,185 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:50,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:24:50,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:50,387 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:24:50,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:50,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1253955360, now seen corresponding path program 5 times [2022-12-14 09:24:50,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:24:50,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531943014] [2022-12-14 09:24:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:50,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:24:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:24:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 26845 backedges. 0 proven. 9361 refuted. 0 times theorem prover too weak. 17484 trivial. 0 not checked. [2022-12-14 09:24:53,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:24:53,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531943014] [2022-12-14 09:24:53,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531943014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:24:53,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062481896] [2022-12-14 09:24:53,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:24:53,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:53,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:53,323 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:53,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:24:53,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2022-12-14 09:24:53,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:53,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 2263 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 09:24:53,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 26845 backedges. 0 proven. 9361 refuted. 0 times theorem prover too weak. 17484 trivial. 0 not checked. [2022-12-14 09:24:54,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 26845 backedges. 0 proven. 9361 refuted. 0 times theorem prover too weak. 17484 trivial. 0 not checked. [2022-12-14 09:24:56,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062481896] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:56,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701297908] [2022-12-14 09:24:56,655 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 09:24:56,655 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:24:56,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:24:56,655 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:24:56,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:24:57,291 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 8 for LOIs [2022-12-14 09:24:57,292 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 8 for LOIs [2022-12-14 09:24:57,293 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:24:57,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11889#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 100000 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 09:24:57,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:24:57,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:24:57,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-12-14 09:24:57,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703240547] [2022-12-14 09:24:57,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:24:57,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 09:24:57,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:24:57,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 09:24:57,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4685, Invalid=6235, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 09:24:57,636 INFO L87 Difference]: Start difference. First operand 431 states and 617 transitions. Second operand has 97 states, 97 states have (on average 4.927835051546392) internal successors, (478), 97 states have internal predecessors, (478), 94 states have call successors, (376), 1 states have call predecessors, (376), 1 states have return successors, (376), 94 states have call predecessors, (376), 94 states have call successors, (376) [2022-12-14 09:24:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:58,610 INFO L93 Difference]: Finished difference Result 866 states and 1291 transitions. [2022-12-14 09:24:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 09:24:58,611 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.927835051546392) internal successors, (478), 97 states have internal predecessors, (478), 94 states have call successors, (376), 1 states have call predecessors, (376), 1 states have return successors, (376), 94 states have call predecessors, (376), 94 states have call successors, (376) Word has length 802 [2022-12-14 09:24:58,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:58,615 INFO L225 Difference]: With dead ends: 866 [2022-12-14 09:24:58,615 INFO L226 Difference]: Without dead ends: 863 [2022-12-14 09:24:58,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2453 GetRequests, 2350 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4685, Invalid=6235, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 09:24:58,618 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 8 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:58,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 761 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 09:24:58,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-12-14 09:24:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2022-12-14 09:24:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 480 states have (on average 1.0020833333333334) internal successors, (481), 480 states have internal predecessors, (481), 380 states have call successors, (380), 2 states have call predecessors, (380), 2 states have return successors, (380), 380 states have call predecessors, (380), 380 states have call successors, (380) [2022-12-14 09:24:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1241 transitions. [2022-12-14 09:24:58,648 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1241 transitions. Word has length 802 [2022-12-14 09:24:58,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:58,649 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1241 transitions. [2022-12-14 09:24:58,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.927835051546392) internal successors, (478), 97 states have internal predecessors, (478), 94 states have call successors, (376), 1 states have call predecessors, (376), 1 states have return successors, (376), 94 states have call predecessors, (376), 94 states have call successors, (376) [2022-12-14 09:24:58,650 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1241 transitions. [2022-12-14 09:24:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1619 [2022-12-14 09:24:58,665 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:58,666 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:58,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 09:24:58,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:58,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:24:58,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:58,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1644275744, now seen corresponding path program 6 times [2022-12-14 09:24:58,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:24:58,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606549030] [2022-12-14 09:24:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:24:58,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:24:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:25:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 111253 backedges. 0 proven. 39433 refuted. 0 times theorem prover too weak. 71820 trivial. 0 not checked. [2022-12-14 09:25:15,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:25:15,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606549030] [2022-12-14 09:25:15,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606549030] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:25:15,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212185507] [2022-12-14 09:25:15,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:25:15,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:25:15,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:25:15,382 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:25:15,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:25:15,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:25:15,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:25:15,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 4587 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 09:25:15,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:25:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 111253 backedges. 0 proven. 39433 refuted. 0 times theorem prover too weak. 71820 trivial. 0 not checked. [2022-12-14 09:25:16,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:25:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 111253 backedges. 0 proven. 39433 refuted. 0 times theorem prover too weak. 71820 trivial. 0 not checked. [2022-12-14 09:25:24,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212185507] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:25:24,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190824605] [2022-12-14 09:25:24,213 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 09:25:24,213 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:25:24,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:25:24,214 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:25:24,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:25:24,797 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 8 for LOIs [2022-12-14 09:25:24,798 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 8 for LOIs [2022-12-14 09:25:24,799 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:25:25,282 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24475#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 100000 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 09:25:25,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:25:25,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:25:25,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-12-14 09:25:25,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858059267] [2022-12-14 09:25:25,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:25:25,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-14 09:25:25,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:25:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-14 09:25:25,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18557, Invalid=21643, Unknown=0, NotChecked=0, Total=40200 [2022-12-14 09:25:25,306 INFO L87 Difference]: Start difference. First operand 863 states and 1241 transitions. Second operand has 193 states, 193 states have (on average 4.963730569948186) internal successors, (958), 193 states have internal predecessors, (958), 190 states have call successors, (760), 1 states have call predecessors, (760), 1 states have return successors, (760), 190 states have call predecessors, (760), 190 states have call successors, (760) [2022-12-14 09:25:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:25:29,005 INFO L93 Difference]: Finished difference Result 1730 states and 2587 transitions. [2022-12-14 09:25:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-14 09:25:29,007 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.963730569948186) internal successors, (958), 193 states have internal predecessors, (958), 190 states have call successors, (760), 1 states have call predecessors, (760), 1 states have return successors, (760), 190 states have call predecessors, (760), 190 states have call successors, (760) Word has length 1618 [2022-12-14 09:25:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:25:29,015 INFO L225 Difference]: With dead ends: 1730 [2022-12-14 09:25:29,015 INFO L226 Difference]: Without dead ends: 1727 [2022-12-14 09:25:29,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4949 GetRequests, 4750 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=18557, Invalid=21643, Unknown=0, NotChecked=0, Total=40200 [2022-12-14 09:25:29,019 INFO L413 NwaCegarLoop]: 781 mSDtfsCounter, 8 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 4179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 4181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:25:29,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1487 Invalid, 4181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4179 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 09:25:29,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-12-14 09:25:29,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1727. [2022-12-14 09:25:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 960 states have (on average 1.0010416666666666) internal successors, (961), 960 states have internal predecessors, (961), 764 states have call successors, (764), 2 states have call predecessors, (764), 2 states have return successors, (764), 764 states have call predecessors, (764), 764 states have call successors, (764) [2022-12-14 09:25:29,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2489 transitions. [2022-12-14 09:25:29,074 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2489 transitions. Word has length 1618 [2022-12-14 09:25:29,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:25:29,076 INFO L495 AbstractCegarLoop]: Abstraction has 1727 states and 2489 transitions. [2022-12-14 09:25:29,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.963730569948186) internal successors, (958), 193 states have internal predecessors, (958), 190 states have call successors, (760), 1 states have call predecessors, (760), 1 states have return successors, (760), 190 states have call predecessors, (760), 190 states have call successors, (760) [2022-12-14 09:25:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2489 transitions. [2022-12-14 09:25:29,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3251 [2022-12-14 09:25:29,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:25:29,158 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:25:29,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:25:29,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 09:25:29,359 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:25:29,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:25:29,360 INFO L85 PathProgramCache]: Analyzing trace with hash 630671904, now seen corresponding path program 7 times [2022-12-14 09:25:29,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:25:29,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122541631] [2022-12-14 09:25:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:25:29,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:25:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 452869 backedges. 0 proven. 161785 refuted. 0 times theorem prover too weak. 291084 trivial. 0 not checked. [2022-12-14 09:27:32,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:32,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122541631] [2022-12-14 09:27:32,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122541631] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:27:32,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866482065] [2022-12-14 09:27:32,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:27:32,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:32,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:27:32,881 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:27:32,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:27:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:34,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 9195 conjuncts, 192 conjunts are in the unsatisfiable core [2022-12-14 09:27:34,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 452869 backedges. 0 proven. 161785 refuted. 0 times theorem prover too weak. 291084 trivial. 0 not checked. [2022-12-14 09:27:35,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:28:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 452869 backedges. 0 proven. 161785 refuted. 0 times theorem prover too weak. 291084 trivial. 0 not checked. [2022-12-14 09:28:05,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866482065] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:28:05,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [132234224] [2022-12-14 09:28:05,086 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 09:28:05,086 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:28:05,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:28:05,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:28:05,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:28:05,702 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 8 for LOIs [2022-12-14 09:28:05,703 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 8 for LOIs [2022-12-14 09:28:05,703 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:28:06,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49733#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 100000 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 09:28:06,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:28:06,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:28:06,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2022-12-14 09:28:06,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533256005] [2022-12-14 09:28:06,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:28:06,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-12-14 09:28:06,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:28:06,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-12-14 09:28:06,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73949, Invalid=80107, Unknown=0, NotChecked=0, Total=154056 [2022-12-14 09:28:06,509 INFO L87 Difference]: Start difference. First operand 1727 states and 2489 transitions. Second operand has 385 states, 385 states have (on average 4.9818181818181815) internal successors, (1918), 385 states have internal predecessors, (1918), 382 states have call successors, (1528), 1 states have call predecessors, (1528), 1 states have return successors, (1528), 382 states have call predecessors, (1528), 382 states have call successors, (1528) [2022-12-14 09:28:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:28:18,461 INFO L93 Difference]: Finished difference Result 3458 states and 5179 transitions. [2022-12-14 09:28:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-12-14 09:28:18,464 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 4.9818181818181815) internal successors, (1918), 385 states have internal predecessors, (1918), 382 states have call successors, (1528), 1 states have call predecessors, (1528), 1 states have return successors, (1528), 382 states have call predecessors, (1528), 382 states have call successors, (1528) Word has length 3250 [2022-12-14 09:28:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:28:18,476 INFO L225 Difference]: With dead ends: 3458 [2022-12-14 09:28:18,476 INFO L226 Difference]: Without dead ends: 3455 [2022-12-14 09:28:18,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9941 GetRequests, 9550 SyntacticMatches, 0 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5351 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=73949, Invalid=80107, Unknown=0, NotChecked=0, Total=154056 [2022-12-14 09:28:18,487 INFO L413 NwaCegarLoop]: 1549 mSDtfsCounter, 8 mSDsluCounter, 1296 mSDsCounter, 0 mSdLazyCounter, 9517 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2845 SdHoareTripleChecker+Invalid, 9519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:28:18,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2845 Invalid, 9519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9517 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-12-14 09:28:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3455 states. [2022-12-14 09:28:18,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 3455. [2022-12-14 09:28:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 1920 states have (on average 1.0005208333333333) internal successors, (1921), 1920 states have internal predecessors, (1921), 1532 states have call successors, (1532), 2 states have call predecessors, (1532), 2 states have return successors, (1532), 1532 states have call predecessors, (1532), 1532 states have call successors, (1532) [2022-12-14 09:28:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 4985 transitions. [2022-12-14 09:28:18,591 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 4985 transitions. Word has length 3250 [2022-12-14 09:28:18,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:28:18,594 INFO L495 AbstractCegarLoop]: Abstraction has 3455 states and 4985 transitions. [2022-12-14 09:28:18,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 4.9818181818181815) internal successors, (1918), 385 states have internal predecessors, (1918), 382 states have call successors, (1528), 1 states have call predecessors, (1528), 1 states have return successors, (1528), 382 states have call predecessors, (1528), 382 states have call successors, (1528) [2022-12-14 09:28:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 4985 transitions. [2022-12-14 09:28:18,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6515 [2022-12-14 09:28:18,847 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:28:18,848 INFO L195 NwaCegarLoop]: trace histogram [766, 766, 382, 382, 382, 382, 382, 382, 382, 382, 382, 382, 382, 382, 382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:28:18,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 09:28:19,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bed95b9d-cb18-4695-bf32-ae0ed012c4dd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:28:19,049 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:28:19,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:28:19,053 INFO L85 PathProgramCache]: Analyzing trace with hash -252015072, now seen corresponding path program 8 times [2022-12-14 09:28:19,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:28:19,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178631100] [2022-12-14 09:28:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:28:19,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:28:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat