./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.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_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/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_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/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_efaea368-9d9b-42d6-9128-48b474561074/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 74e9855722264d342377b8ab219a69c32c582cc628f82167488f3dea5640534c --- 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 06:26:10,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:26:10,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:26:10,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:26:10,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:26:10,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:26:10,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:26:10,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:26:10,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:26:10,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:26:10,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:26:10,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:26:10,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:26:10,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:26:10,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:26:10,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:26:10,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:26:10,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:26:10,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:26:10,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:26:10,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:26:10,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:26:10,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:26:10,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:26:10,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:26:10,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:26:10,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:26:10,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:26:10,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:26:10,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:26:10,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:26:10,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:26:10,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:26:10,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:26:10,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:26:10,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:26:10,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:26:10,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:26:10,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:26:10,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:26:10,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:26:10,347 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:26:10,368 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:26:10,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:26:10,369 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:26:10,369 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:26:10,370 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:26:10,370 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:26:10,370 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:26:10,370 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:26:10,371 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:26:10,371 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:26:10,371 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:26:10,371 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:26:10,371 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:26:10,372 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:26:10,372 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:26:10,372 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:26:10,372 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:26:10,372 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:26:10,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:26:10,373 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:26:10,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:26:10,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:26:10,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:26:10,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:26:10,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:26:10,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:26:10,375 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:26:10,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:26:10,375 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:26:10,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:26:10,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:26:10,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:26:10,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:26:10,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:26:10,376 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:26:10,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:26:10,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:26:10,377 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:26:10,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:26:10,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:26:10,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:26:10,377 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_efaea368-9d9b-42d6-9128-48b474561074/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74e9855722264d342377b8ab219a69c32c582cc628f82167488f3dea5640534c [2022-12-14 06:26:10,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:26:10,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:26:10,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:26:10,589 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:26:10,590 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:26:10,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2022-12-14 06:26:13,286 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:26:13,438 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:26:13,439 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2022-12-14 06:26:13,444 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/data/ae0e3c880/498044294c5f47aeb2a713bb65d4c5a5/FLAG09843db38 [2022-12-14 06:26:13,456 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/data/ae0e3c880/498044294c5f47aeb2a713bb65d4c5a5 [2022-12-14 06:26:13,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:26:13,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:26:13,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:26:13,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:26:13,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:26:13,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:26:13" (1/1) ... [2022-12-14 06:26:13,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b20921b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:13, skipping insertion in model container [2022-12-14 06:26:13,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:26:13" (1/1) ... [2022-12-14 06:26:13,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:26:13,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:26:13,601 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_efaea368-9d9b-42d6-9128-48b474561074/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c[490,503] [2022-12-14 06:26:13,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:26:13,624 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:26:13,633 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_efaea368-9d9b-42d6-9128-48b474561074/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c[490,503] [2022-12-14 06:26:13,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:26:13,649 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:26:13,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:13 WrapperNode [2022-12-14 06:26:13,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:26:13,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:26:13,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:26:13,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:26:13,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:13" (1/1) ... [2022-12-14 06:26:13,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:13" (1/1) ... [2022-12-14 06:26:13,676 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2022-12-14 06:26:13,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:26:13,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:26:13,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:26:13,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:26:13,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:13" (1/1) ... [2022-12-14 06:26:13,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:13" (1/1) ... [2022-12-14 06:26:13,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:13" (1/1) ... [2022-12-14 06:26:13,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:13" (1/1) ... [2022-12-14 06:26:13,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:13" (1/1) ... [2022-12-14 06:26:13,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:13" (1/1) ... [2022-12-14 06:26:13,692 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:13" (1/1) ... [2022-12-14 06:26:13,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:13" (1/1) ... [2022-12-14 06:26:13,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:26:13,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:26:13,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:26:13,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:26:13,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:13" (1/1) ... [2022-12-14 06:26:13,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:26:13,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:13,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:26:13,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:26:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:26:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 06:26:13,750 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 06:26:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:26:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:26:13,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:26:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 06:26:13,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 06:26:13,803 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:26:13,804 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:26:13,926 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:26:13,953 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:26:13,954 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 06:26:13,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:26:13 BoogieIcfgContainer [2022-12-14 06:26:13,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:26:13,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:26:13,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:26:13,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:26:13,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:26:13" (1/3) ... [2022-12-14 06:26:13,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223fb42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:26:13, skipping insertion in model container [2022-12-14 06:26:13,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:13" (2/3) ... [2022-12-14 06:26:13,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223fb42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:26:13, skipping insertion in model container [2022-12-14 06:26:13,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:26:13" (3/3) ... [2022-12-14 06:26:13,966 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound5.c [2022-12-14 06:26:13,984 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:26:13,984 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:26:14,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:26:14,044 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;@1e8f4994, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:26:14,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:26:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 06:26:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 06:26:14,058 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:26:14,059 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:26:14,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:26:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:26:14,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1288775727, now seen corresponding path program 1 times [2022-12-14 06:26:14,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:26:14,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746545957] [2022-12-14 06:26:14,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:14,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:26:14,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:26:14,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051779158] [2022-12-14 06:26:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:14,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:14,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:14,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:26:14,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:26:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:14,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 06:26:14,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:26:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:26:14,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:26:14,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:26:14,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746545957] [2022-12-14 06:26:14,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:26:14,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051779158] [2022-12-14 06:26:14,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051779158] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:26:14,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:26:14,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:26:14,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748180838] [2022-12-14 06:26:14,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:26:14,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 06:26:14,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:26:14,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 06:26:14,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:26:14,295 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:26:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:26:14,319 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2022-12-14 06:26:14,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 06:26:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 19 [2022-12-14 06:26:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:26:14,328 INFO L225 Difference]: With dead ends: 50 [2022-12-14 06:26:14,328 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 06:26:14,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 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 06:26:14,333 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:26:14,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:26:14,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 06:26:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 06:26:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 06:26:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-12-14 06:26:14,362 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 19 [2022-12-14 06:26:14,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:26:14,363 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-12-14 06:26:14,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:26:14,364 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-12-14 06:26:14,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 06:26:14,365 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:26:14,365 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:26:14,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:26:14,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 06:26:14,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:26:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:26:14,567 INFO L85 PathProgramCache]: Analyzing trace with hash 226858993, now seen corresponding path program 1 times [2022-12-14 06:26:14,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:26:14,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267374523] [2022-12-14 06:26:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:14,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:26:14,583 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:26:14,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317686913] [2022-12-14 06:26:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:14,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:14,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:14,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:26:14,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:26:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:14,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:26:14,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:26:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:26:14,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:26:14,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:26:14,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267374523] [2022-12-14 06:26:14,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:26:14,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317686913] [2022-12-14 06:26:14,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317686913] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:26:14,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:26:14,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:26:14,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517890232] [2022-12-14 06:26:14,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:26:14,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:26:14,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:26:14,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:26:14,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:26:14,744 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:26:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:26:14,763 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-12-14 06:26:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:26:14,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 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 06:26:14,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:26:14,764 INFO L225 Difference]: With dead ends: 37 [2022-12-14 06:26:14,764 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 06:26:14,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 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 06:26:14,766 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:26:14,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:26:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 06:26:14,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-14 06:26:14,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 06:26:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2022-12-14 06:26:14,771 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2022-12-14 06:26:14,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:26:14,771 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2022-12-14 06:26:14,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:26:14,772 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2022-12-14 06:26:14,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 06:26:14,772 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:26:14,772 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:26:14,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:26:14,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:14,974 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:26:14,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:26:14,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1563892497, now seen corresponding path program 1 times [2022-12-14 06:26:14,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:26:14,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727903440] [2022-12-14 06:26:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:14,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:26:15,015 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:26:15,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927884610] [2022-12-14 06:26:15,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:15,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:15,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:15,021 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:26:15,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:26:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:15,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:26:15,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:26:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:26:15,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:26:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:26:15,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:26:15,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727903440] [2022-12-14 06:26:15,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:26:15,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927884610] [2022-12-14 06:26:15,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927884610] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:26:15,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1768638951] [2022-12-14 06:26:15,231 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 06:26:15,231 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:26:15,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:26:15,239 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:26:15,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:26:15,809 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-12-14 06:26:15,831 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:26:16,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1768638951] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:26:16,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:26:16,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 5] total 15 [2022-12-14 06:26:16,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416785848] [2022-12-14 06:26:16,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:26:16,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 06:26:16,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:26:16,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 06:26:16,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:26:16,801 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 06:26:16,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:26:16,962 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-12-14 06:26:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 06:26:16,963 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2022-12-14 06:26:16,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:26:16,963 INFO L225 Difference]: With dead ends: 38 [2022-12-14 06:26:16,964 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 06:26:16,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:26:16,965 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:26:16,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:26:16,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 06:26:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 06:26:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 06:26:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-12-14 06:26:16,975 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 21 [2022-12-14 06:26:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:26:16,975 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-12-14 06:26:16,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 06:26:16,976 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-12-14 06:26:16,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 06:26:16,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:26:16,976 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:26:16,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:26:17,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:17,177 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:26:17,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:26:17,178 INFO L85 PathProgramCache]: Analyzing trace with hash 281079646, now seen corresponding path program 1 times [2022-12-14 06:26:17,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:26:17,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037111999] [2022-12-14 06:26:17,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:17,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:26:17,189 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:26:17,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069801784] [2022-12-14 06:26:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:17,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:17,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:17,191 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:26:17,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:26:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:17,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 06:26:17,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:26:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:26:17,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:26:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:26:17,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:26:17,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037111999] [2022-12-14 06:26:17,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:26:17,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069801784] [2022-12-14 06:26:17,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069801784] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:26:17,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:26:17,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-12-14 06:26:17,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462433039] [2022-12-14 06:26:17,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:26:17,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:26:17,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:26:17,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:26:17,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:26:17,334 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:26:17,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:26:17,394 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-12-14 06:26:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:26:17,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 23 [2022-12-14 06:26:17,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:26:17,395 INFO L225 Difference]: With dead ends: 36 [2022-12-14 06:26:17,395 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 06:26:17,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:26:17,396 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:26:17,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 95 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:26:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 06:26:17,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-12-14 06:26:17,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 06:26:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-12-14 06:26:17,404 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 23 [2022-12-14 06:26:17,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:26:17,404 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-12-14 06:26:17,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:26:17,404 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-12-14 06:26:17,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 06:26:17,405 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:26:17,405 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:26:17,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:26:17,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:17,607 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:26:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:26:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash -717512630, now seen corresponding path program 1 times [2022-12-14 06:26:17,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:26:17,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502873432] [2022-12-14 06:26:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:17,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:26:17,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:26:17,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775188227] [2022-12-14 06:26:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:17,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:17,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:17,647 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:26:17,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:26:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:17,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 06:26:17,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:26:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:26:17,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:26:17,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:26:17,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502873432] [2022-12-14 06:26:17,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:26:17,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775188227] [2022-12-14 06:26:17,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775188227] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:26:17,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:26:17,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:26:17,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751618820] [2022-12-14 06:26:17,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:26:17,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:26:17,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:26:17,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:26:17,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:26:17,888 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:26:17,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:26:17,913 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2022-12-14 06:26:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:26:17,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 26 [2022-12-14 06:26:17,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:26:17,914 INFO L225 Difference]: With dead ends: 59 [2022-12-14 06:26:17,914 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 06:26:17,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:26:17,915 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:26:17,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:26:17,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 06:26:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 06:26:17,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 06:26:17,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-12-14 06:26:17,922 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 26 [2022-12-14 06:26:17,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:26:17,922 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-12-14 06:26:17,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:26:17,922 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-12-14 06:26:17,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 06:26:17,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:26:17,923 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 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 06:26:17,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:26:18,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:18,125 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:26:18,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:26:18,126 INFO L85 PathProgramCache]: Analyzing trace with hash -207347326, now seen corresponding path program 1 times [2022-12-14 06:26:18,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:26:18,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155177306] [2022-12-14 06:26:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:18,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:26:18,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:26:18,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751044715] [2022-12-14 06:26:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:18,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:18,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:18,155 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:26:18,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:26:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:18,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 06:26:18,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:26:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:26:18,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:26:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:26:18,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:26:18,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155177306] [2022-12-14 06:26:18,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:26:18,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751044715] [2022-12-14 06:26:18,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751044715] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:26:18,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:26:18,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-12-14 06:26:18,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498134738] [2022-12-14 06:26:18,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:26:18,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:26:18,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:26:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:26:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:26:18,517 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:26:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:26:18,568 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-12-14 06:26:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:26:18,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2022-12-14 06:26:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:26:18,569 INFO L225 Difference]: With dead ends: 50 [2022-12-14 06:26:18,569 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 06:26:18,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-12-14 06:26:18,570 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:26:18,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:26:18,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 06:26:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-12-14 06:26:18,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 06:26:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-12-14 06:26:18,579 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 28 [2022-12-14 06:26:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:26:18,579 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-12-14 06:26:18,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:26:18,580 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-12-14 06:26:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 06:26:18,580 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:26:18,580 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 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 06:26:18,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 06:26:18,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:18,781 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:26:18,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:26:18,782 INFO L85 PathProgramCache]: Analyzing trace with hash -159662690, now seen corresponding path program 1 times [2022-12-14 06:26:18,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:26:18,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830523567] [2022-12-14 06:26:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:18,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:26:18,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:26:18,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070195457] [2022-12-14 06:26:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:18,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:18,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:18,790 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:26:18,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:26:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:18,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 06:26:18,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:26:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:26:18,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:26:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 06:26:19,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:26:19,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830523567] [2022-12-14 06:26:19,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:26:19,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070195457] [2022-12-14 06:26:19,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070195457] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:26:19,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:26:19,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2022-12-14 06:26:19,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681010642] [2022-12-14 06:26:19,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:26:19,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:26:19,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:26:19,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:26:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:26:19,086 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:26:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:26:19,156 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-12-14 06:26:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:26:19,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 33 [2022-12-14 06:26:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:26:19,157 INFO L225 Difference]: With dead ends: 54 [2022-12-14 06:26:19,157 INFO L226 Difference]: Without dead ends: 52 [2022-12-14 06:26:19,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:26:19,158 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:26:19,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 112 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:26:19,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-14 06:26:19,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-12-14 06:26:19,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 06:26:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-12-14 06:26:19,175 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 33 [2022-12-14 06:26:19,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:26:19,175 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-12-14 06:26:19,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:26:19,176 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-12-14 06:26:19,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 06:26:19,177 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:26:19,177 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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 06:26:19,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:26:19,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 06:26:19,379 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:26:19,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:26:19,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2048234814, now seen corresponding path program 1 times [2022-12-14 06:26:19,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:26:19,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750401689] [2022-12-14 06:26:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:19,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:26:19,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:26:19,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53747614] [2022-12-14 06:26:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:19,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:19,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:19,429 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:26:19,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:26:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:19,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 06:26:19,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:26:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:26:19,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:26:19,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:26:19,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750401689] [2022-12-14 06:26:19,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:26:19,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53747614] [2022-12-14 06:26:19,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53747614] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:26:19,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603095427] [2022-12-14 06:26:19,829 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 06:26:19,829 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:26:19,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:26:19,829 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:26:19,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:26:20,852 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-12-14 06:26:20,861 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-12-14 06:26:20,879 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:26:37,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [603095427] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:26:37,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:26:37,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7] total 22 [2022-12-14 06:26:37,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556452055] [2022-12-14 06:26:37,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:26:37,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 06:26:37,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:26:37,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 06:26:37,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-12-14 06:26:37,460 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 06:26:39,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:26:39,092 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-12-14 06:26:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 06:26:39,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 38 [2022-12-14 06:26:39,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:26:39,094 INFO L225 Difference]: With dead ends: 75 [2022-12-14 06:26:39,094 INFO L226 Difference]: Without dead ends: 73 [2022-12-14 06:26:39,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-12-14 06:26:39,095 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:26:39,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 117 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 06:26:39,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-14 06:26:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-12-14 06:26:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 06:26:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-12-14 06:26:39,111 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 38 [2022-12-14 06:26:39,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:26:39,111 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-12-14 06:26:39,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 06:26:39,112 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-12-14 06:26:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 06:26:39,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:26:39,113 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 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 06:26:39,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 06:26:39,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:39,314 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:26:39,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:26:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2026078407, now seen corresponding path program 1 times [2022-12-14 06:26:39,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:26:39,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056947358] [2022-12-14 06:26:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:39,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:26:39,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:26:39,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252907711] [2022-12-14 06:26:39,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:39,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:39,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:39,329 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:26:39,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:26:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:39,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:26:39,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:26:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 06:26:39,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:26:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 06:26:39,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:26:39,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056947358] [2022-12-14 06:26:39,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:26:39,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252907711] [2022-12-14 06:26:39,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252907711] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:26:39,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1546151788] [2022-12-14 06:26:39,499 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 06:26:39,499 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:26:39,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:26:39,500 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:26:39,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:26:47,350 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2022-12-14 06:26:47,354 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-12-14 06:26:47,363 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:26:54,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1546151788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:26:54,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:26:54,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [5, 6] total 25 [2022-12-14 06:26:54,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185742717] [2022-12-14 06:26:54,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:26:54,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 06:26:54,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:26:54,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 06:26:54,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-12-14 06:26:54,080 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 06:26:58,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:26:58,978 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2022-12-14 06:26:58,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 06:26:58,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2022-12-14 06:26:58,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:26:58,980 INFO L225 Difference]: With dead ends: 114 [2022-12-14 06:26:58,980 INFO L226 Difference]: Without dead ends: 91 [2022-12-14 06:26:58,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 103 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-12-14 06:26:58,982 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:26:58,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 131 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 06:26:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-14 06:26:59,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-12-14 06:26:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 58 states have internal predecessors, (66), 22 states have call successors, (22), 11 states have call predecessors, (22), 11 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-12-14 06:26:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2022-12-14 06:26:59,012 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 47 [2022-12-14 06:26:59,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:26:59,013 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2022-12-14 06:26:59,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 06:26:59,013 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2022-12-14 06:26:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 06:26:59,014 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:26:59,014 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 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 06:26:59,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 06:26:59,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 06:26:59,216 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:26:59,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:26:59,217 INFO L85 PathProgramCache]: Analyzing trace with hash -892989886, now seen corresponding path program 1 times [2022-12-14 06:26:59,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:26:59,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565001593] [2022-12-14 06:26:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:59,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:26:59,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:26:59,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28228718] [2022-12-14 06:26:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:59,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:59,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:59,242 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:26:59,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:26:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:59,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:26:59,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:26:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 06:26:59,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:26:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 06:26:59,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:26:59,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565001593] [2022-12-14 06:26:59,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:26:59,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28228718] [2022-12-14 06:26:59,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28228718] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:26:59,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1127281551] [2022-12-14 06:26:59,398 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 06:26:59,398 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:26:59,399 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:26:59,399 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:26:59,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:27:11,535 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 06:27:11,539 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-12-14 06:27:11,554 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:27:20,244 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3001#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:27:20,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:27:20,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:27:20,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2022-12-14 06:27:20,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062790343] [2022-12-14 06:27:20,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:27:20,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:27:20,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:20,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:27:20,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2022-12-14 06:27:20,246 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 06:27:20,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:20,348 INFO L93 Difference]: Finished difference Result 197 states and 234 transitions. [2022-12-14 06:27:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 06:27:20,349 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 49 [2022-12-14 06:27:20,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:20,350 INFO L225 Difference]: With dead ends: 197 [2022-12-14 06:27:20,350 INFO L226 Difference]: Without dead ends: 174 [2022-12-14 06:27:20,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 06:27:20,351 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 39 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:27:20,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 208 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:27:20,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-12-14 06:27:20,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 166. [2022-12-14 06:27:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 108 states have (on average 1.1481481481481481) internal successors, (124), 110 states have internal predecessors, (124), 36 states have call successors, (36), 21 states have call predecessors, (36), 21 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 06:27:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 194 transitions. [2022-12-14 06:27:20,377 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 194 transitions. Word has length 49 [2022-12-14 06:27:20,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:20,378 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 194 transitions. [2022-12-14 06:27:20,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 06:27:20,378 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 194 transitions. [2022-12-14 06:27:20,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 06:27:20,378 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:20,379 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:20,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 06:27:20,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 06:27:20,581 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:20,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:20,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1428661434, now seen corresponding path program 1 times [2022-12-14 06:27:20,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:20,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042621947] [2022-12-14 06:27:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:20,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:20,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:27:20,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977546512] [2022-12-14 06:27:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:20,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:27:20,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:27:20,607 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:27:20,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:27:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:20,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 06:27:20,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:27:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 06:27:20,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:27:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 06:27:20,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:20,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042621947] [2022-12-14 06:27:20,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:27:20,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977546512] [2022-12-14 06:27:20,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977546512] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:27:20,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519203312] [2022-12-14 06:27:20,838 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 06:27:20,838 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:27:20,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:27:20,838 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:27:20,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:27:25,161 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 06:27:25,164 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-12-14 06:27:25,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:27:34,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3916#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:27:34,251 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:27:34,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:27:34,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-12-14 06:27:34,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593932341] [2022-12-14 06:27:34,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:27:34,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:27:34,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:34,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:27:34,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-12-14 06:27:34,252 INFO L87 Difference]: Start difference. First operand 166 states and 194 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 06:27:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:34,392 INFO L93 Difference]: Finished difference Result 185 states and 217 transitions. [2022-12-14 06:27:34,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:27:34,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 61 [2022-12-14 06:27:34,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:34,394 INFO L225 Difference]: With dead ends: 185 [2022-12-14 06:27:34,394 INFO L226 Difference]: Without dead ends: 183 [2022-12-14 06:27:34,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-12-14 06:27:34,395 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:27:34,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 121 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:27:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-12-14 06:27:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-12-14 06:27:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 121 states have internal predecessors, (134), 40 states have call successors, (40), 23 states have call predecessors, (40), 23 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-12-14 06:27:34,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 212 transitions. [2022-12-14 06:27:34,422 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 212 transitions. Word has length 61 [2022-12-14 06:27:34,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:34,422 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 212 transitions. [2022-12-14 06:27:34,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 06:27:34,422 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 212 transitions. [2022-12-14 06:27:34,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 06:27:34,423 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:34,423 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:34,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 06:27:34,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 06:27:34,625 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:34,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:34,626 INFO L85 PathProgramCache]: Analyzing trace with hash 2138832335, now seen corresponding path program 1 times [2022-12-14 06:27:34,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:34,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543888468] [2022-12-14 06:27:34,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:34,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:34,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:27:34,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405766315] [2022-12-14 06:27:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:34,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:27:34,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:27:34,653 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:27:34,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 06:27:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:34,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 06:27:34,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:27:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 06:27:34,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:27:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-12-14 06:27:34,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:34,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543888468] [2022-12-14 06:27:34,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:27:34,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405766315] [2022-12-14 06:27:34,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405766315] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:27:34,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [208724007] [2022-12-14 06:27:34,808 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 06:27:34,808 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:27:34,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:27:34,808 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:27:34,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:27:43,308 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2022-12-14 06:27:43,311 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-12-14 06:27:43,322 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:27:46,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4889#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 06:27:46,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:27:46,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:27:46,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-12-14 06:27:46,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711390581] [2022-12-14 06:27:46,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:27:46,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:27:46,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:46,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:27:46,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-12-14 06:27:46,175 INFO L87 Difference]: Start difference. First operand 182 states and 212 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 6 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2022-12-14 06:27:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:46,286 INFO L93 Difference]: Finished difference Result 204 states and 235 transitions. [2022-12-14 06:27:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 06:27:46,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 6 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 70 [2022-12-14 06:27:46,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:46,288 INFO L225 Difference]: With dead ends: 204 [2022-12-14 06:27:46,288 INFO L226 Difference]: Without dead ends: 190 [2022-12-14 06:27:46,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2022-12-14 06:27:46,288 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 20 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:27:46,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 202 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:27:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-12-14 06:27:46,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2022-12-14 06:27:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 121 states have (on average 1.1239669421487604) internal successors, (136), 124 states have internal predecessors, (136), 40 states have call successors, (40), 23 states have call predecessors, (40), 23 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-12-14 06:27:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 214 transitions. [2022-12-14 06:27:46,314 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 214 transitions. Word has length 70 [2022-12-14 06:27:46,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:46,315 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 214 transitions. [2022-12-14 06:27:46,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 6 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2022-12-14 06:27:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 214 transitions. [2022-12-14 06:27:46,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 06:27:46,316 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:46,316 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:46,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 06:27:46,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:27:46,517 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:46,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:46,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1872706257, now seen corresponding path program 1 times [2022-12-14 06:27:46,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:46,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419927926] [2022-12-14 06:27:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:46,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:46,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:27:46,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831127689] [2022-12-14 06:27:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:46,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:27:46,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:27:46,544 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:27:46,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 06:27:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:46,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 06:27:46,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:27:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 06:27:46,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:27:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-12-14 06:27:47,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:47,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419927926] [2022-12-14 06:27:47,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:27:47,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831127689] [2022-12-14 06:27:47,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831127689] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:27:47,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2069916698] [2022-12-14 06:27:47,490 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 06:27:47,491 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:27:47,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:27:47,491 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:27:47,491 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:27:58,345 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 06:27:58,349 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-12-14 06:27:58,360 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:28:05,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5911#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:28:05,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:28:05,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:28:05,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-12-14 06:28:05,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213925239] [2022-12-14 06:28:05,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:28:05,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 06:28:05,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:05,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 06:28:05,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 06:28:05,023 INFO L87 Difference]: Start difference. First operand 185 states and 214 transitions. Second operand has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-12-14 06:28:15,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:15,261 INFO L93 Difference]: Finished difference Result 266 states and 342 transitions. [2022-12-14 06:28:15,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 06:28:15,261 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 71 [2022-12-14 06:28:15,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:15,262 INFO L225 Difference]: With dead ends: 266 [2022-12-14 06:28:15,262 INFO L226 Difference]: Without dead ends: 262 [2022-12-14 06:28:15,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=491, Invalid=3799, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 06:28:15,263 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 165 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:15,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 430 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-12-14 06:28:15,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-12-14 06:28:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 238. [2022-12-14 06:28:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 148 states have (on average 1.1891891891891893) internal successors, (176), 151 states have internal predecessors, (176), 65 states have call successors, (65), 25 states have call predecessors, (65), 24 states have return successors, (63), 61 states have call predecessors, (63), 63 states have call successors, (63) [2022-12-14 06:28:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 304 transitions. [2022-12-14 06:28:15,312 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 304 transitions. Word has length 71 [2022-12-14 06:28:15,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:15,313 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 304 transitions. [2022-12-14 06:28:15,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-12-14 06:28:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 304 transitions. [2022-12-14 06:28:15,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 06:28:15,313 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:15,313 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:28:15,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 06:28:15,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:15,515 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:15,516 INFO L85 PathProgramCache]: Analyzing trace with hash -273783569, now seen corresponding path program 1 times [2022-12-14 06:28:15,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:15,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253153413] [2022-12-14 06:28:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:15,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:15,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:28:15,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27533907] [2022-12-14 06:28:15,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:15,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:15,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:28:15,542 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:28:15,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 06:28:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:15,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 06:28:15,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:28:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 35 proven. 20 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-12-14 06:28:16,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:28:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-12-14 06:28:16,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:16,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253153413] [2022-12-14 06:28:16,251 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:28:16,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27533907] [2022-12-14 06:28:16,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27533907] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:28:16,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098971170] [2022-12-14 06:28:16,254 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-12-14 06:28:16,254 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:28:16,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:28:16,254 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:28:16,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:28:26,123 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2022-12-14 06:28:26,125 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-12-14 06:28:26,135 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:28:30,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7191#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 06:28:30,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:28:30,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:28:30,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2022-12-14 06:28:30,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068870666] [2022-12-14 06:28:30,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:28:30,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 06:28:30,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:30,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 06:28:30,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1376, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 06:28:30,699 INFO L87 Difference]: Start difference. First operand 238 states and 304 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-12-14 06:28:35,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:35,407 INFO L93 Difference]: Finished difference Result 313 states and 410 transitions. [2022-12-14 06:28:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 06:28:35,408 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 76 [2022-12-14 06:28:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:35,409 INFO L225 Difference]: With dead ends: 313 [2022-12-14 06:28:35,409 INFO L226 Difference]: Without dead ends: 299 [2022-12-14 06:28:35,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 06:28:35,410 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 111 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:35,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 281 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 06:28:35,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-12-14 06:28:35,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 262. [2022-12-14 06:28:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 167 states have (on average 1.1916167664670658) internal successors, (199), 172 states have internal predecessors, (199), 67 states have call successors, (67), 27 states have call predecessors, (67), 27 states have return successors, (65), 62 states have call predecessors, (65), 65 states have call successors, (65) [2022-12-14 06:28:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 331 transitions. [2022-12-14 06:28:35,467 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 331 transitions. Word has length 76 [2022-12-14 06:28:35,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:35,467 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 331 transitions. [2022-12-14 06:28:35,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-12-14 06:28:35,467 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 331 transitions. [2022-12-14 06:28:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 06:28:35,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:35,468 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:28:35,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 06:28:35,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 06:28:35,669 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:35,670 INFO L85 PathProgramCache]: Analyzing trace with hash 951211296, now seen corresponding path program 1 times [2022-12-14 06:28:35,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:35,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929633337] [2022-12-14 06:28:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:35,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:35,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:28:35,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213279576] [2022-12-14 06:28:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:35,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:35,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:28:35,697 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:28:35,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 06:28:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:35,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 06:28:35,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:28:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 51 proven. 26 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-12-14 06:28:36,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:28:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-12-14 06:28:37,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:37,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929633337] [2022-12-14 06:28:37,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:28:37,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213279576] [2022-12-14 06:28:37,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213279576] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:28:37,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1088090353] [2022-12-14 06:28:37,895 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 06:28:37,896 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:28:37,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:28:37,896 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:28:37,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:28:46,467 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2022-12-14 06:28:46,469 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-12-14 06:28:46,479 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:28:52,471 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8628#(and (<= ~counter~0 6) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 06:28:52,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:28:52,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:28:52,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2022-12-14 06:28:52,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187582708] [2022-12-14 06:28:52,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:28:52,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 06:28:52,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:52,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 06:28:52,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 06:28:52,472 INFO L87 Difference]: Start difference. First operand 262 states and 331 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-12-14 06:28:55,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 06:28:57,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 06:29:08,791 WARN L233 SmtUtils]: Spent 9.86s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:29:24,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 06:29:33,228 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:29:36,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 06:29:44,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 06:29:50,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:50,761 INFO L93 Difference]: Finished difference Result 349 states and 460 transitions. [2022-12-14 06:29:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 06:29:50,761 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 88 [2022-12-14 06:29:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:50,762 INFO L225 Difference]: With dead ends: 349 [2022-12-14 06:29:50,762 INFO L226 Difference]: Without dead ends: 347 [2022-12-14 06:29:50,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=537, Invalid=3003, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 06:29:50,763 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 129 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 141 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:50,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 250 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1038 Invalid, 3 Unknown, 0 Unchecked, 22.3s Time] [2022-12-14 06:29:50,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-12-14 06:29:50,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 324. [2022-12-14 06:29:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 207 states have (on average 1.2367149758454106) internal successors, (256), 213 states have internal predecessors, (256), 87 states have call successors, (87), 29 states have call predecessors, (87), 29 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2022-12-14 06:29:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 428 transitions. [2022-12-14 06:29:50,873 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 428 transitions. Word has length 88 [2022-12-14 06:29:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:50,873 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 428 transitions. [2022-12-14 06:29:50,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-12-14 06:29:50,874 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 428 transitions. [2022-12-14 06:29:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 06:29:50,874 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:50,875 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:50,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 06:29:51,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 06:29:51,076 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:51,078 INFO L85 PathProgramCache]: Analyzing trace with hash -893729499, now seen corresponding path program 2 times [2022-12-14 06:29:51,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:51,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673890870] [2022-12-14 06:29:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:51,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:51,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:29:51,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257922786] [2022-12-14 06:29:51,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:29:51,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:51,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:51,106 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:29:51,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 06:29:51,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 06:29:51,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-12-14 06:29:51,184 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 06:29:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 06:29:51,245 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 06:29:51,245 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 06:29:51,246 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 06:29:51,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 06:29:51,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:51,453 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:51,459 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 06:29:51,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 06:29:51 BoogieIcfgContainer [2022-12-14 06:29:51,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 06:29:51,516 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 06:29:51,516 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 06:29:51,516 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 06:29:51,516 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:26:13" (3/4) ... [2022-12-14 06:29:51,517 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 06:29:51,552 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 06:29:51,553 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 06:29:51,553 INFO L158 Benchmark]: Toolchain (without parser) took 218094.17ms. Allocated memory was 186.6MB in the beginning and 325.1MB in the end (delta: 138.4MB). Free memory was 150.8MB in the beginning and 149.6MB in the end (delta: 1.2MB). Peak memory consumption was 141.5MB. Max. memory is 16.1GB. [2022-12-14 06:29:51,553 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 119.5MB. Free memory was 83.2MB in the beginning and 83.1MB in the end (delta: 24.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 06:29:51,554 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.27ms. Allocated memory is still 186.6MB. Free memory was 150.8MB in the beginning and 140.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 06:29:51,554 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.77ms. Allocated memory is still 186.6MB. Free memory was 140.1MB in the beginning and 138.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 06:29:51,554 INFO L158 Benchmark]: Boogie Preprocessor took 16.72ms. Allocated memory is still 186.6MB. Free memory was 138.2MB in the beginning and 137.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 06:29:51,554 INFO L158 Benchmark]: RCFGBuilder took 262.48ms. Allocated memory is still 186.6MB. Free memory was 137.1MB in the beginning and 123.6MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 06:29:51,555 INFO L158 Benchmark]: TraceAbstraction took 217555.83ms. Allocated memory was 186.6MB in the beginning and 325.1MB in the end (delta: 138.4MB). Free memory was 123.3MB in the beginning and 154.8MB in the end (delta: -31.5MB). Peak memory consumption was 110.1MB. Max. memory is 16.1GB. [2022-12-14 06:29:51,555 INFO L158 Benchmark]: Witness Printer took 37.09ms. Allocated memory is still 325.1MB. Free memory was 154.8MB in the beginning and 149.6MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 06:29:51,557 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 119.5MB. Free memory was 83.2MB in the beginning and 83.1MB in the end (delta: 24.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.27ms. Allocated memory is still 186.6MB. Free memory was 150.8MB in the beginning and 140.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.77ms. Allocated memory is still 186.6MB. Free memory was 140.1MB in the beginning and 138.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.72ms. Allocated memory is still 186.6MB. Free memory was 138.2MB in the beginning and 137.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 262.48ms. Allocated memory is still 186.6MB. Free memory was 137.1MB in the beginning and 123.6MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 217555.83ms. Allocated memory was 186.6MB in the beginning and 325.1MB in the end (delta: 138.4MB). Free memory was 123.3MB in the beginning and 154.8MB in the end (delta: -31.5MB). Peak memory consumption was 110.1MB. Max. memory is 16.1GB. * Witness Printer took 37.09ms. Allocated memory is still 325.1MB. Free memory was 154.8MB in the beginning and 149.6MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=2, y=3] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=2, y=3] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y VAL [a=2, b=3, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L37] CALL assume_abort_if_not(xy < 2147483647) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L37] RET assume_abort_if_not(xy < 2147483647) VAL [a=2, b=3, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L38] CALL assume_abort_if_not(yy < 2147483647) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L38] RET assume_abort_if_not(yy < 2147483647) VAL [a=2, b=3, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L40] EXPR counter++ VAL [a=2, b=3, c=0, counter=1, counter++=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [a=2, b=3, c=2, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L46] EXPR counter++ VAL [a=2, b=3, c=2, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L51] COND TRUE !(c >= b) VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [a=3, b=2, c=2, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L40] EXPR counter++ VAL [a=3, b=2, c=2, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [a=3, b=2, c=3, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L46] EXPR counter++ VAL [a=3, b=2, c=3, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [a=3, b=2, c=1, counter=4, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L46] EXPR counter++ VAL [a=3, b=2, c=1, counter=5, counter++=4, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L51] COND TRUE !(c >= b) VAL [a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [a=2, b=1, c=1, counter=5, k=1, p=1, q=-1, r=0, s=1, temp=1, x=2, xy=6, y=3, yy=9] [L40] EXPR counter++ VAL [a=2, b=1, c=1, counter=6, counter++=5, k=1, p=1, q=-1, r=0, s=1, temp=1, x=2, xy=6, y=3, yy=9] [L40] COND FALSE !(counter++<5) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) VAL [\old(cond)=0, counter=6] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=6] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 217.4s, OverallIterations: 16, TraceHistogramMax: 13, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 80.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 533 SdHoareTripleChecker+Valid, 31.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 502 mSDsluCounter, 2400 SdHoareTripleChecker+Invalid, 31.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1848 mSDsCounter, 455 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3904 IncrementalHoareTripleChecker+Invalid, 4362 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 455 mSolverCounterUnsat, 552 mSDtfsCounter, 3904 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1809 GetRequests, 1417 SyntacticMatches, 30 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4939 ImplicationChecksByTransitivity, 111.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=324occurred in iteration=15, InterpolantAutomatonStates: 180, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 102 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 767 NumberOfCodeBlocks, 767 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1211 ConstructedInterpolants, 0 QuantifiedInterpolants, 7339 SizeOfPredicates, 61 NumberOfNonLiveVariables, 2298 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 26 InterpolantComputations, 6 PerfectInterpolantSequences, 1893/2122 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: OVERALL_TIME: 9.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 87, DAG_INTERPRETER_EARLY_EXITS: 4, TOOLS_POST_APPLICATIONS: 56, TOOLS_POST_TIME: 0.8s, TOOLS_POST_CALL_APPLICATIONS: 74, TOOLS_POST_CALL_TIME: 6.5s, TOOLS_POST_RETURN_APPLICATIONS: 54, TOOLS_POST_RETURN_TIME: 0.6s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 184, TOOLS_QUANTIFIERELIM_TIME: 7.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.4s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 208, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 90, DOMAIN_JOIN_TIME: 0.9s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 87, DOMAIN_ISBOTTOM_TIME: 0.7s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 3.6s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 3.6s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 54, CALL_SUMMARIZER_CACHE_MISSES: 5, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 1107, DAG_COMPRESSION_RETAINED_NODES: 206, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 06:29:51,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efaea368-9d9b-42d6-9128-48b474561074/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE