./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/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_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/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_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/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 81afa9e511be2b9bae9d4ea2d6181d1112c109837a9a39236c346cbee76c712e --- 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 06:29:25,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:29:25,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:29:25,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:29:25,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:29:25,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:29:25,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:29:25,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:29:25,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:29:25,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:29:25,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:29:25,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:29:25,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:29:25,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:29:25,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:29:25,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:29:25,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:29:25,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:29:25,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:29:25,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:29:25,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:29:25,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:29:25,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:29:25,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:29:25,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:29:25,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:29:25,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:29:25,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:29:25,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:29:25,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:29:25,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:29:25,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:29:25,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:29:25,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:29:25,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:29:25,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:29:25,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:29:25,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:29:25,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:29:25,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:29:25,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:29:25,713 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:29:25,740 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:29:25,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:29:25,741 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:29:25,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:29:25,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:29:25,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:29:25,742 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:29:25,742 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:29:25,742 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:29:25,743 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:29:25,743 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:29:25,743 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:29:25,743 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:29:25,743 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:29:25,744 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:29:25,744 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:29:25,744 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:29:25,744 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:29:25,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:29:25,745 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:29:25,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:29:25,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:29:25,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:29:25,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:29:25,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:29:25,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:29:25,746 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:29:25,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:29:25,747 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:29:25,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:29:25,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:29:25,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:29:25,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:29:25,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:29:25,748 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:29:25,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:29:25,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:29:25,749 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:29:25,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:29:25,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:29:25,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:29:25,749 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_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81afa9e511be2b9bae9d4ea2d6181d1112c109837a9a39236c346cbee76c712e [2022-12-14 06:29:25,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:29:25,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:29:25,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:29:25,953 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:29:25,954 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:29:25,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound20.c [2022-12-14 06:29:28,550 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:29:28,710 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:29:28,710 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound20.c [2022-12-14 06:29:28,714 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/data/026eb1fc7/b1cbdd89e7d646c68d850f6b2f65c323/FLAG277850374 [2022-12-14 06:29:29,128 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/data/026eb1fc7/b1cbdd89e7d646c68d850f6b2f65c323 [2022-12-14 06:29:29,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:29:29,133 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:29:29,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:29:29,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:29:29,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:29:29,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d319ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29, skipping insertion in model container [2022-12-14 06:29:29,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:29:29,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:29:29,265 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_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound20.c[458,471] [2022-12-14 06:29:29,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:29:29,283 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:29:29,292 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_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound20.c[458,471] [2022-12-14 06:29:29,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:29:29,304 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:29:29,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29 WrapperNode [2022-12-14 06:29:29,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:29:29,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:29:29,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:29:29,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:29:29,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,327 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2022-12-14 06:29:29,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:29:29,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:29:29,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:29:29,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:29:29,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,340 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:29:29,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:29:29,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:29:29,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:29:29,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:29:29,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:29,365 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:29:29,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:29:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:29:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:29:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:29:29,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:29:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 06:29:29,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 06:29:29,461 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:29:29,463 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:29:29,563 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:29:29,577 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:29:29,577 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 06:29:29,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:29:29 BoogieIcfgContainer [2022-12-14 06:29:29,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:29:29,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:29:29,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:29:29,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:29:29,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:29:29" (1/3) ... [2022-12-14 06:29:29,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219b1672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:29:29, skipping insertion in model container [2022-12-14 06:29:29,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (2/3) ... [2022-12-14 06:29:29,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219b1672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:29:29, skipping insertion in model container [2022-12-14 06:29:29,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:29:29" (3/3) ... [2022-12-14 06:29:29,588 INFO L112 eAbstractionObserver]: Analyzing ICFG ps3-ll_unwindbound20.c [2022-12-14 06:29:29,606 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:29:29,606 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:29:29,655 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:29:29,662 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;@2efe587, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:29:29,662 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:29:29,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 06:29:29,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 06:29:29,673 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:29,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 06:29:29,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2138246143, now seen corresponding path program 1 times [2022-12-14 06:29:29,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:29,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287551139] [2022-12-14 06:29:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:29,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:29,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:29,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287551139] [2022-12-14 06:29:29,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 06:29:29,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009834544] [2022-12-14 06:29:29,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:29,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:29,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:29,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:29:29,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:29:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:29,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 06:29:29,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:29:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:29:29,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:29:29,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009834544] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:29:29,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:29:29,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:29:29,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376757905] [2022-12-14 06:29:29,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:29:29,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 06:29:29,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:29,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 06:29:29,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:29:29,890 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:29:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:29,909 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-12-14 06:29:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 06:29:29,911 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 06:29:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:29,919 INFO L225 Difference]: With dead ends: 27 [2022-12-14 06:29:29,919 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 06:29:29,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:29:29,925 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:29,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:29:29,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 06:29:29,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 06:29:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 06:29:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-12-14 06:29:29,955 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2022-12-14 06:29:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:29,955 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-12-14 06:29:29,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:29:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-12-14 06:29:29,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 06:29:29,956 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:29,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:29,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-14 06:29:30,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 06:29:30,159 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:30,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:30,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1461620770, now seen corresponding path program 1 times [2022-12-14 06:29:30,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:30,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966790513] [2022-12-14 06:29:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:30,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:30,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:30,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966790513] [2022-12-14 06:29:30,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 06:29:30,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82617640] [2022-12-14 06:29:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:30,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:30,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:30,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:29:30,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:29:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:30,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:29:30,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:29:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:29:30,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:29:30,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82617640] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:29:30,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:29:30,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:29:30,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835835273] [2022-12-14 06:29:30,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:29:30,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:29:30,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:30,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:29:30,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:29:30,357 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:29:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:30,371 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-12-14 06:29:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:29:30,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 06:29:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:30,373 INFO L225 Difference]: With dead ends: 21 [2022-12-14 06:29:30,373 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 06:29:30,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:29:30,375 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:30,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:29:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 06:29:30,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 06:29:30,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 06:29:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-12-14 06:29:30,378 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2022-12-14 06:29:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:30,379 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-12-14 06:29:30,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:29:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-12-14 06:29:30,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 06:29:30,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:30,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:30,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 06:29:30,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:30,580 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:30,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1463408230, now seen corresponding path program 1 times [2022-12-14 06:29:30,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:30,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812041641] [2022-12-14 06:29:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:30,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:30,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:29:30,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841480168] [2022-12-14 06:29:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:30,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:30,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:30,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:29:30,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:29:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:30,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:29:30,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:29:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:29:30,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:29:30,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:30,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812041641] [2022-12-14 06:29:30,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:29:30,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841480168] [2022-12-14 06:29:30,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841480168] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:29:30,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:29:30,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:29:30,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269981489] [2022-12-14 06:29:30,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:29:30,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:29:30,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:30,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:29:30,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:29:30,675 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:29:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:30,710 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-12-14 06:29:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:29:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 06:29:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:30,712 INFO L225 Difference]: With dead ends: 23 [2022-12-14 06:29:30,712 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 06:29:30,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:29:30,713 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:30,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:29:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 06:29:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 06:29:30,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 06:29:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-12-14 06:29:30,718 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 7 [2022-12-14 06:29:30,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:30,718 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-12-14 06:29:30,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:29:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-12-14 06:29:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:29:30,719 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:30,719 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:30,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:29:30,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:30,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:30,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:30,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1726160663, now seen corresponding path program 1 times [2022-12-14 06:29:30,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:30,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126669526] [2022-12-14 06:29:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:30,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:30,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:29:30,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147280544] [2022-12-14 06:29:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:30,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:30,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:30,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:29:30,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:29:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:30,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 06:29:30,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:29:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:29:31,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:29:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:29:31,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:31,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126669526] [2022-12-14 06:29:31,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:29:31,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147280544] [2022-12-14 06:29:31,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147280544] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:29:31,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1207385193] [2022-12-14 06:29:31,065 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 06:29:31,065 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:29:31,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:29:31,071 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:29:31,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:29:31,568 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 52 for LOIs [2022-12-14 06:29:31,638 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:29:32,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '331#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:29:32,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:29:32,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:29:32,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-12-14 06:29:32,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516106185] [2022-12-14 06:29:32,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:29:32,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:29:32,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:32,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:29:32,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-12-14 06:29:32,179 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 06:29:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:32,240 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-12-14 06:29:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:29:32,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-12-14 06:29:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:32,241 INFO L225 Difference]: With dead ends: 51 [2022-12-14 06:29:32,241 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 06:29:32,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-12-14 06:29:32,243 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:32,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 60 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:29:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 06:29:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-12-14 06:29:32,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 06:29:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-12-14 06:29:32,250 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2022-12-14 06:29:32,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:32,250 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-12-14 06:29:32,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 06:29:32,251 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-12-14 06:29:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:29:32,251 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:32,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:32,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:29:32,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:32,453 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:32,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:32,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1724373203, now seen corresponding path program 1 times [2022-12-14 06:29:32,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:32,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452736170] [2022-12-14 06:29:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:32,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:32,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:29:32,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616363674] [2022-12-14 06:29:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:32,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:32,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:32,493 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:29:32,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:29:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 06:29:32,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:29:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:29:32,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:29:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:29:32,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:32,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452736170] [2022-12-14 06:29:32,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:29:32,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616363674] [2022-12-14 06:29:32,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616363674] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:29:32,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199774332] [2022-12-14 06:29:32,838 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:29:32,838 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:29:32,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:29:32,838 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:29:32,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:29:33,114 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2022-12-14 06:29:33,133 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:29:33,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '565#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:29:33,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:29:33,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:29:33,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2022-12-14 06:29:33,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137731796] [2022-12-14 06:29:33,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:29:33,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 06:29:33,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:33,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 06:29:33,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-14 06:29:33,511 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 06:29:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:33,574 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-12-14 06:29:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:29:33,574 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-12-14 06:29:33,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:33,574 INFO L225 Difference]: With dead ends: 40 [2022-12-14 06:29:33,574 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 06:29:33,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:29:33,576 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:33,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 49 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:29:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 06:29:33,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 06:29:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:29:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 06:29:33,577 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2022-12-14 06:29:33,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:33,577 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 06:29:33,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 06:29:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 06:29:33,577 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 06:29:33,579 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 06:29:33,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:29:33,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:33,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-14 06:29:33,838 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-12-14 06:29:33,838 INFO L899 garLoopResultBuilder]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2022-12-14 06:29:33,838 INFO L895 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (= (* 6 |ULTIMATE.start_main_~x~0#1|) (+ (* 3 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) 2) |ULTIMATE.start_main_~y~0#1|)) [2022-12-14 06:29:33,838 INFO L895 garLoopResultBuilder]: At program point L27-4(lines 27 36) the Hoare annotation is: (= (* 6 |ULTIMATE.start_main_~x~0#1|) (+ (* 3 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) 2) |ULTIMATE.start_main_~y~0#1|)) [2022-12-14 06:29:33,838 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2022-12-14 06:29:33,838 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (= (* 6 |ULTIMATE.start_main_~x~0#1|) (+ (* 3 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) 2) |ULTIMATE.start_main_~y~0#1|)) [2022-12-14 06:29:33,838 INFO L899 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2022-12-14 06:29:33,838 INFO L902 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: true [2022-12-14 06:29:33,839 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2022-12-14 06:29:33,839 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2022-12-14 06:29:33,839 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2022-12-14 06:29:33,839 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 15) the Hoare annotation is: true [2022-12-14 06:29:33,839 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2022-12-14 06:29:33,839 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2022-12-14 06:29:33,842 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-14 06:29:33,843 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 06:29:33,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 06:29:33 BoogieIcfgContainer [2022-12-14 06:29:33,853 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 06:29:33,854 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 06:29:33,854 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 06:29:33,854 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 06:29:33,854 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:29:29" (3/4) ... [2022-12-14 06:29:33,856 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 06:29:33,860 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-12-14 06:29:33,862 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-12-14 06:29:33,862 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-12-14 06:29:33,862 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-14 06:29:33,862 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 06:29:33,883 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 06:29:33,883 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 06:29:33,884 INFO L158 Benchmark]: Toolchain (without parser) took 4751.42ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 74.5MB in the beginning and 95.4MB in the end (delta: -20.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 06:29:33,884 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 109.1MB. Free memory is still 78.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 06:29:33,885 INFO L158 Benchmark]: CACSL2BoogieTranslator took 171.33ms. Allocated memory is still 109.1MB. Free memory was 74.5MB in the beginning and 64.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 06:29:33,885 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.66ms. Allocated memory is still 109.1MB. Free memory was 64.0MB in the beginning and 62.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 06:29:33,885 INFO L158 Benchmark]: Boogie Preprocessor took 13.62ms. Allocated memory is still 109.1MB. Free memory was 62.6MB in the beginning and 61.6MB in the end (delta: 943.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 06:29:33,885 INFO L158 Benchmark]: RCFGBuilder took 238.03ms. Allocated memory is still 109.1MB. Free memory was 61.6MB in the beginning and 51.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 06:29:33,886 INFO L158 Benchmark]: TraceAbstraction took 4271.20ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 50.5MB in the beginning and 97.5MB in the end (delta: -47.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 06:29:33,886 INFO L158 Benchmark]: Witness Printer took 30.04ms. Allocated memory is still 136.3MB. Free memory was 97.5MB in the beginning and 95.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 06:29:33,887 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 109.1MB. Free memory is still 78.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 171.33ms. Allocated memory is still 109.1MB. Free memory was 74.5MB in the beginning and 64.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.66ms. Allocated memory is still 109.1MB. Free memory was 64.0MB in the beginning and 62.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.62ms. Allocated memory is still 109.1MB. Free memory was 62.6MB in the beginning and 61.6MB in the end (delta: 943.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 238.03ms. Allocated memory is still 109.1MB. Free memory was 61.6MB in the beginning and 51.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4271.20ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 50.5MB in the beginning and 97.5MB in the end (delta: -47.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 30.04ms. Allocated memory is still 136.3MB. Free memory was 97.5MB in the beginning and 95.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.2s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 39 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 37 mSDsluCounter, 189 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 130 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 120 IncrementalHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 59 mSDtfsCounter, 120 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 108 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=4, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 16 PreInvPairs, 30 NumberOfFragments, 53 HoareAnnotationTreeSize, 16 FomulaSimplifications, 84 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 114 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 274 SizeOfPredicates, 4 NumberOfNonLiveVariables, 283 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 9/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 6 * x == 3 * (y * y) + y * y * y * 2 + y - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-12-14 06:29:33,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76146e3-7f74-4d7b-846c-39a8f38fc2f4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE