./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS --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 9e9911e775b3214ba13077b05d83e9364947724e9afa3bb89f51b07ee325bd90 --- 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-8393723 [2022-11-19 06:38:37,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:38:37,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:38:37,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:38:37,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:38:37,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:38:37,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:38:37,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:38:37,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:38:37,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:38:37,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:38:37,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:38:37,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:38:37,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:38:37,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:38:37,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:38:37,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:38:37,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:38:37,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:38:37,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:38:37,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:38:37,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:38:37,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:38:37,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:38:37,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:38:37,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:38:37,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:38:37,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:38:37,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:38:37,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:38:37,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:38:37,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:38:37,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:38:37,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:38:37,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:38:37,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:38:37,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:38:37,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:38:37,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:38:37,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:38:37,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:38:37,554 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:38:37,587 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:38:37,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:38:37,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:38:37,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:38:37,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:38:37,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:38:37,589 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:38:37,589 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:38:37,589 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:38:37,590 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:38:37,590 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:38:37,590 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:38:37,590 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:38:37,590 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:38:37,591 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:38:37,591 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:38:37,591 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:38:37,591 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:38:37,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:38:37,592 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:38:37,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:38:37,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:38:37,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:38:37,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:38:37,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:38:37,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:38:37,593 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:38:37,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:38:37,594 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:38:37,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:38:37,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:38:37,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:38:37,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:38:37,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:38:37,600 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:38:37,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:38:37,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:38:37,602 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:38:37,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:38:37,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:38:37,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:38:37,602 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_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e9911e775b3214ba13077b05d83e9364947724e9afa3bb89f51b07ee325bd90 [2022-11-19 06:38:37,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:38:37,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:38:37,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:38:37,945 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:38:37,946 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:38:37,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2022-11-19 06:38:38,018 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/data/4cd6446a1/548cc3667d0946aabd0dd070811895d8/FLAG88298934f [2022-11-19 06:38:38,553 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:38:38,554 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2022-11-19 06:38:38,566 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/data/4cd6446a1/548cc3667d0946aabd0dd070811895d8/FLAG88298934f [2022-11-19 06:38:38,943 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/data/4cd6446a1/548cc3667d0946aabd0dd070811895d8 [2022-11-19 06:38:38,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:38:38,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:38:38,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:38:38,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:38:38,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:38:38,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:38:38" (1/1) ... [2022-11-19 06:38:38,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50dc32f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:38, skipping insertion in model container [2022-11-19 06:38:38,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:38:38" (1/1) ... [2022-11-19 06:38:38,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:38:38,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:38:39,182 WARN L234 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_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c[490,503] [2022-11-19 06:38:39,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:38:39,211 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:38:39,224 WARN L234 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_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c[490,503] [2022-11-19 06:38:39,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:38:39,248 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:38:39,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:39 WrapperNode [2022-11-19 06:38:39,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:38:39,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:38:39,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:38:39,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:38:39,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:39" (1/1) ... [2022-11-19 06:38:39,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:39" (1/1) ... [2022-11-19 06:38:39,284 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2022-11-19 06:38:39,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:38:39,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:38:39,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:38:39,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:38:39,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:39" (1/1) ... [2022-11-19 06:38:39,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:39" (1/1) ... [2022-11-19 06:38:39,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:39" (1/1) ... [2022-11-19 06:38:39,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:39" (1/1) ... [2022-11-19 06:38:39,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:39" (1/1) ... [2022-11-19 06:38:39,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:39" (1/1) ... [2022-11-19 06:38:39,306 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:39" (1/1) ... [2022-11-19 06:38:39,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:39" (1/1) ... [2022-11-19 06:38:39,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:38:39,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:38:39,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:38:39,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:38:39,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:39" (1/1) ... [2022-11-19 06:38:39,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:38:39,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:39,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:38:39,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:38:39,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:38:39,390 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 06:38:39,390 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 06:38:39,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:38:39,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:38:39,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:38:39,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 06:38:39,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 06:38:39,462 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:38:39,464 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:38:39,683 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:38:39,736 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:38:39,736 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 06:38:39,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:38:39 BoogieIcfgContainer [2022-11-19 06:38:39,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:38:39,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:38:39,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:38:39,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:38:39,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:38:38" (1/3) ... [2022-11-19 06:38:39,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a44e37d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:38:39, skipping insertion in model container [2022-11-19 06:38:39,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:39" (2/3) ... [2022-11-19 06:38:39,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a44e37d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:38:39, skipping insertion in model container [2022-11-19 06:38:39,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:38:39" (3/3) ... [2022-11-19 06:38:39,762 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound20.c [2022-11-19 06:38:39,781 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:38:39,782 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:38:39,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:38:39,840 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;@7e39ae9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:38:39,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:38:39,845 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) [2022-11-19 06:38:39,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 06:38:39,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:39,854 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:39,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2133247598, now seen corresponding path program 1 times [2022-11-19 06:38:39,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:39,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274432990] [2022-11-19 06:38:39,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:39,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:40,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:40,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205757470] [2022-11-19 06:38:40,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:40,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:40,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:40,010 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:40,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:38:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:40,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-19 06:38:40,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:38:40,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:38:40,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:40,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274432990] [2022-11-19 06:38:40,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:40,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205757470] [2022-11-19 06:38:40,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205757470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:38:40,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:38:40,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:38:40,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304840600] [2022-11-19 06:38:40,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:40,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 06:38:40,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:40,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 06:38:40,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:38:40,215 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) [2022-11-19 06:38:40,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:40,264 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2022-11-19 06:38:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 06:38:40,267 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 [2022-11-19 06:38:40,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:40,275 INFO L225 Difference]: With dead ends: 50 [2022-11-19 06:38:40,276 INFO L226 Difference]: Without dead ends: 27 [2022-11-19 06:38:40,279 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 [2022-11-19 06:38:40,284 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 [2022-11-19 06:38:40,286 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] [2022-11-19 06:38:40,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-19 06:38:40,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-19 06:38:40,334 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) [2022-11-19 06:38:40,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-11-19 06:38:40,337 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 19 [2022-11-19 06:38:40,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:40,339 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-11-19 06:38:40,340 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) [2022-11-19 06:38:40,340 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-11-19 06:38:40,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 06:38:40,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:40,344 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:40,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 06:38:40,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 06:38:40,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:40,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:40,552 INFO L85 PathProgramCache]: Analyzing trace with hash 635683218, now seen corresponding path program 1 times [2022-11-19 06:38:40,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:40,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85816411] [2022-11-19 06:38:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:40,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:40,579 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:40,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066442172] [2022-11-19 06:38:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:40,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:40,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:40,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:40,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:38:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:40,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:38:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:38:40,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:38:40,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:40,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85816411] [2022-11-19 06:38:40,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:40,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066442172] [2022-11-19 06:38:40,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066442172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:38:40,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:38:40,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:38:40,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671918745] [2022-11-19 06:38:40,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:40,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:38:40,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:38:40,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:38:40,761 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) [2022-11-19 06:38:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:40,785 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-11-19 06:38:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:38:40,785 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 [2022-11-19 06:38:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:40,786 INFO L225 Difference]: With dead ends: 37 [2022-11-19 06:38:40,787 INFO L226 Difference]: Without dead ends: 29 [2022-11-19 06:38:40,787 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 [2022-11-19 06:38:40,788 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 [2022-11-19 06:38:40,789 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] [2022-11-19 06:38:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-19 06:38:40,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-19 06:38:40,796 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) [2022-11-19 06:38:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2022-11-19 06:38:40,797 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2022-11-19 06:38:40,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:40,798 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2022-11-19 06:38:40,798 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) [2022-11-19 06:38:40,798 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2022-11-19 06:38:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 06:38:40,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:40,799 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:40,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:41,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:41,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:41,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1775243410, now seen corresponding path program 1 times [2022-11-19 06:38:41,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:41,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591170699] [2022-11-19 06:38:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:41,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:41,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:41,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340069810] [2022-11-19 06:38:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:41,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:41,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:41,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:41,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:38:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:41,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:38:41,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:38:41,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:38:41,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:41,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591170699] [2022-11-19 06:38:41,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:41,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340069810] [2022-11-19 06:38:41,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340069810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:38:41,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1208930547] [2022-11-19 06:38:41,357 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:38:41,357 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:38:41,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:38:41,374 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:38:41,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:38:42,328 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:38:42,359 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:38:44,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1208930547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:38:44,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:38:44,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 5] total 15 [2022-11-19 06:38:44,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162181984] [2022-11-19 06:38:44,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:44,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 06:38:44,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:44,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 06:38:44,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-19 06:38:44,212 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) [2022-11-19 06:38:45,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:45,135 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-19 06:38:45,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:38:45,136 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 [2022-11-19 06:38:45,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:45,137 INFO L225 Difference]: With dead ends: 38 [2022-11-19 06:38:45,137 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 06:38:45,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-19 06:38:45,139 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:45,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 06:38:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 06:38:45,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-19 06:38:45,151 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) [2022-11-19 06:38:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-11-19 06:38:45,154 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 21 [2022-11-19 06:38:45,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:45,155 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-11-19 06:38:45,156 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) [2022-11-19 06:38:45,156 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-11-19 06:38:45,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 06:38:45,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:45,157 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] [2022-11-19 06:38:45,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:45,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:45,363 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:45,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:45,364 INFO L85 PathProgramCache]: Analyzing trace with hash -963684835, now seen corresponding path program 1 times [2022-11-19 06:38:45,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:45,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140674359] [2022-11-19 06:38:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:45,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:45,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:45,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17243836] [2022-11-19 06:38:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:45,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:45,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:45,387 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:45,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:38:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 06:38:45,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:38:45,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:38:45,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:45,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140674359] [2022-11-19 06:38:45,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:45,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17243836] [2022-11-19 06:38:45,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17243836] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 06:38:45,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:38:45,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-19 06:38:45,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721799797] [2022-11-19 06:38:45,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:45,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:38:45,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:45,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:38:45,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:38:45,649 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) [2022-11-19 06:38:45,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:45,725 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-19 06:38:45,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:38:45,726 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 [2022-11-19 06:38:45,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:45,728 INFO L225 Difference]: With dead ends: 36 [2022-11-19 06:38:45,728 INFO L226 Difference]: Without dead ends: 34 [2022-11-19 06:38:45,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:38:45,733 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 [2022-11-19 06:38:45,735 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] [2022-11-19 06:38:45,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-19 06:38:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-19 06:38:45,758 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) [2022-11-19 06:38:45,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-19 06:38:45,767 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 23 [2022-11-19 06:38:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:45,767 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-19 06:38:45,768 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) [2022-11-19 06:38:45,768 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-19 06:38:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 06:38:45,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:45,770 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] [2022-11-19 06:38:45,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 06:38:45,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:45,975 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:45,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:45,976 INFO L85 PathProgramCache]: Analyzing trace with hash -748532437, now seen corresponding path program 1 times [2022-11-19 06:38:45,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:45,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998157954] [2022-11-19 06:38:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:45,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:45,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:45,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484577078] [2022-11-19 06:38:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:45,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:45,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:45,999 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:46,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:38:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:46,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 06:38:46,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:38:46,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:38:46,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:46,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998157954] [2022-11-19 06:38:46,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:46,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484577078] [2022-11-19 06:38:46,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484577078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:38:46,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:38:46,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:38:46,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323330527] [2022-11-19 06:38:46,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:46,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:38:46,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:46,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:38:46,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:38:46,120 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) [2022-11-19 06:38:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:46,163 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2022-11-19 06:38:46,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:38:46,164 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 [2022-11-19 06:38:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:46,166 INFO L225 Difference]: With dead ends: 59 [2022-11-19 06:38:46,166 INFO L226 Difference]: Without dead ends: 36 [2022-11-19 06:38:46,167 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 [2022-11-19 06:38:46,170 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:46,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 91 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:38:46,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-19 06:38:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-19 06:38:46,198 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) [2022-11-19 06:38:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-11-19 06:38:46,199 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 26 [2022-11-19 06:38:46,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:46,199 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-11-19 06:38:46,200 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) [2022-11-19 06:38:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-11-19 06:38:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 06:38:46,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:46,201 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] [2022-11-19 06:38:46,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 06:38:46,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:46,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:46,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:46,407 INFO L85 PathProgramCache]: Analyzing trace with hash 47389219, now seen corresponding path program 1 times [2022-11-19 06:38:46,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:46,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752808868] [2022-11-19 06:38:46,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:46,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:46,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:46,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047698772] [2022-11-19 06:38:46,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:46,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:46,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:46,420 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:46,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:38:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:46,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 06:38:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 06:38:46,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:46,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:38:46,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:46,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752808868] [2022-11-19 06:38:46,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:46,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047698772] [2022-11-19 06:38:46,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047698772] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 06:38:46,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:38:46,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-11-19 06:38:46,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188026524] [2022-11-19 06:38:46,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:46,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:38:46,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:46,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:38:46,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:38:46,884 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) [2022-11-19 06:38:46,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:46,957 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-11-19 06:38:46,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:38:46,958 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 [2022-11-19 06:38:46,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:46,959 INFO L225 Difference]: With dead ends: 50 [2022-11-19 06:38:46,959 INFO L226 Difference]: Without dead ends: 48 [2022-11-19 06:38:46,959 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 [2022-11-19 06:38:46,961 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 [2022-11-19 06:38:46,962 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] [2022-11-19 06:38:46,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-19 06:38:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-19 06:38:46,983 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) [2022-11-19 06:38:46,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-11-19 06:38:46,986 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 28 [2022-11-19 06:38:46,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:46,988 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-11-19 06:38:46,988 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) [2022-11-19 06:38:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-11-19 06:38:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 06:38:46,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:46,992 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] [2022-11-19 06:38:47,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:47,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 06:38:47,199 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:47,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:47,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2024014237, now seen corresponding path program 1 times [2022-11-19 06:38:47,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:47,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691543379] [2022-11-19 06:38:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:47,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:47,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:47,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609933517] [2022-11-19 06:38:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:47,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:47,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:47,229 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:47,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:38:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:47,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 06:38:47,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:38:47,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:38:47,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:47,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691543379] [2022-11-19 06:38:47,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:47,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609933517] [2022-11-19 06:38:47,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609933517] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 06:38:47,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:38:47,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2022-11-19 06:38:47,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473691818] [2022-11-19 06:38:47,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:47,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:38:47,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:47,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:38:47,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:38:47,651 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) [2022-11-19 06:38:47,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:47,748 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-11-19 06:38:47,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:38:47,749 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 [2022-11-19 06:38:47,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:47,750 INFO L225 Difference]: With dead ends: 54 [2022-11-19 06:38:47,750 INFO L226 Difference]: Without dead ends: 52 [2022-11-19 06:38:47,751 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 [2022-11-19 06:38:47,751 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:47,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 112 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:38:47,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-19 06:38:47,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-19 06:38:47,782 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) [2022-11-19 06:38:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-11-19 06:38:47,783 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 33 [2022-11-19 06:38:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:47,784 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-11-19 06:38:47,784 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) [2022-11-19 06:38:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-11-19 06:38:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 06:38:47,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:47,785 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] [2022-11-19 06:38:47,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:47,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 06:38:47,991 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:47,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:47,992 INFO L85 PathProgramCache]: Analyzing trace with hash 613928483, now seen corresponding path program 1 times [2022-11-19 06:38:47,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:47,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761886118] [2022-11-19 06:38:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:47,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:48,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:48,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700737368] [2022-11-19 06:38:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:48,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:48,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:48,003 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:48,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:38:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:48,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 06:38:48,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 06:38:48,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:48,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:48,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761886118] [2022-11-19 06:38:48,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:48,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700737368] [2022-11-19 06:38:48,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700737368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:38:48,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225912203] [2022-11-19 06:38:48,389 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 06:38:48,389 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:38:48,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:38:48,390 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:38:48,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:38:49,824 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-19 06:38:49,835 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:38:49,855 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:39:04,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1225912203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:39:04,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:39:04,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7] total 22 [2022-11-19 06:39:04,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834865600] [2022-11-19 06:39:04,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:39:04,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 06:39:04,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:39:04,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 06:39:04,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-11-19 06:39:04,200 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) [2022-11-19 06:39:05,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:39:05,203 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-11-19 06:39:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 06:39:05,203 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 [2022-11-19 06:39:05,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:39:05,205 INFO L225 Difference]: With dead ends: 75 [2022-11-19 06:39:05,205 INFO L226 Difference]: Without dead ends: 73 [2022-11-19 06:39:05,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-11-19 06:39:05,206 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:39:05,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 117 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 06:39:05,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-19 06:39:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-11-19 06:39:05,226 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) [2022-11-19 06:39:05,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-11-19 06:39:05,227 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 38 [2022-11-19 06:39:05,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:39:05,228 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-11-19 06:39:05,228 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) [2022-11-19 06:39:05,228 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-11-19 06:39:05,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 06:39:05,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:39:05,229 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] [2022-11-19 06:39:05,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-19 06:39:05,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:05,434 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:39:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:39:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash 55138950, now seen corresponding path program 1 times [2022-11-19 06:39:05,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:39:05,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075446606] [2022-11-19 06:39:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:05,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:39:05,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:39:05,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879222989] [2022-11-19 06:39:05,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:05,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:05,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:39:05,463 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:39:05,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:39:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:05,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:39:05,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:39:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 06:39:05,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:39:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 06:39:05,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:39:05,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075446606] [2022-11-19 06:39:05,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:39:05,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879222989] [2022-11-19 06:39:05,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879222989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:39:05,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940899414] [2022-11-19 06:39:05,755 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 06:39:05,756 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:39:05,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:39:05,756 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:39:05,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:39:17,640 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2022-11-19 06:39:17,645 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:39:17,661 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:39:28,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1940899414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:39:28,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:39:28,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [5, 6] total 26 [2022-11-19 06:39:28,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470276812] [2022-11-19 06:39:28,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:39:28,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 06:39:28,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:39:28,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 06:39:28,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2022-11-19 06:39:28,720 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) [2022-11-19 06:39:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:39:31,998 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2022-11-19 06:39:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 06:39:31,999 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 [2022-11-19 06:39:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:39:32,004 INFO L225 Difference]: With dead ends: 114 [2022-11-19 06:39:32,004 INFO L226 Difference]: Without dead ends: 91 [2022-11-19 06:39:32,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 103 SyntacticMatches, 12 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2022-11-19 06:39:32,008 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:39:32,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 06:39:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-19 06:39:32,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-19 06:39:32,060 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) [2022-11-19 06:39:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2022-11-19 06:39:32,064 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 47 [2022-11-19 06:39:32,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:39:32,064 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2022-11-19 06:39:32,064 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) [2022-11-19 06:39:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2022-11-19 06:39:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 06:39:32,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:39:32,069 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] [2022-11-19 06:39:32,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:39:32,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:32,274 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:39:32,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:39:32,274 INFO L85 PathProgramCache]: Analyzing trace with hash -885230527, now seen corresponding path program 1 times [2022-11-19 06:39:32,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:39:32,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572840524] [2022-11-19 06:39:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:32,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:39:32,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:39:32,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638532196] [2022-11-19 06:39:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:32,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:32,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:39:32,286 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:39:32,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:39:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:32,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:39:32,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:39:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 06:39:32,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:39:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 06:39:32,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:39:32,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572840524] [2022-11-19 06:39:32,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:39:32,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638532196] [2022-11-19 06:39:32,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638532196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:39:32,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [698922196] [2022-11-19 06:39:32,493 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 06:39:32,493 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:39:32,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:39:32,494 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:39:32,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:39:48,086 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-19 06:39:48,090 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:39:48,105 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:00,585 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3003#(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 [2022-11-19 06:40:00,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:00,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:40:00,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-19 06:40:00,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137365415] [2022-11-19 06:40:00,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:00,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 06:40:00,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:00,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 06:40:00,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 06:40:00,589 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-19 06:40:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:00,890 INFO L93 Difference]: Finished difference Result 239 states and 287 transitions. [2022-11-19 06:40:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:40:00,891 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 49 [2022-11-19 06:40:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:00,894 INFO L225 Difference]: With dead ends: 239 [2022-11-19 06:40:00,894 INFO L226 Difference]: Without dead ends: 216 [2022-11-19 06:40:00,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 06:40:00,900 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 88 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:00,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 197 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:40:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-19 06:40:00,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 202. [2022-11-19 06:40:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 133 states have internal predecessors, (151), 46 states have call successors, (46), 25 states have call predecessors, (46), 25 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-19 06:40:00,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2022-11-19 06:40:00,967 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 49 [2022-11-19 06:40:00,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:00,968 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2022-11-19 06:40:00,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-19 06:40:00,968 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2022-11-19 06:40:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 06:40:00,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:00,972 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] [2022-11-19 06:40:00,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:01,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:01,178 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:01,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:01,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1699609543, now seen corresponding path program 1 times [2022-11-19 06:40:01,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:01,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002052956] [2022-11-19 06:40:01,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:01,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:01,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:40:01,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581966431] [2022-11-19 06:40:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:01,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:01,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:01,190 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:01,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 06:40:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:01,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 06:40:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 06:40:01,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 06:40:01,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:01,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002052956] [2022-11-19 06:40:01,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:40:01,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581966431] [2022-11-19 06:40:01,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581966431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:01,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1626113489] [2022-11-19 06:40:01,502 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-19 06:40:01,502 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:01,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:01,503 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:01,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:07,202 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-19 06:40:07,206 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:40:07,221 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:18,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4033#(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 [2022-11-19 06:40:18,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:18,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:40:18,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-19 06:40:18,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634019580] [2022-11-19 06:40:18,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:18,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:40:18,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:18,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:40:18,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-11-19 06:40:18,611 INFO L87 Difference]: Start difference. First operand 202 states and 240 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) [2022-11-19 06:40:18,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:18,875 INFO L93 Difference]: Finished difference Result 231 states and 277 transitions. [2022-11-19 06:40:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:40:18,875 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 [2022-11-19 06:40:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:18,879 INFO L225 Difference]: With dead ends: 231 [2022-11-19 06:40:18,879 INFO L226 Difference]: Without dead ends: 229 [2022-11-19 06:40:18,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-11-19 06:40:18,880 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:18,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 76 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:40:18,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-19 06:40:18,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-11-19 06:40:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 145 states have (on average 1.1448275862068966) internal successors, (166), 150 states have internal predecessors, (166), 54 states have call successors, (54), 28 states have call predecessors, (54), 28 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2022-11-19 06:40:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 271 transitions. [2022-11-19 06:40:18,937 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 271 transitions. Word has length 61 [2022-11-19 06:40:18,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:18,937 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 271 transitions. [2022-11-19 06:40:18,938 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) [2022-11-19 06:40:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 271 transitions. [2022-11-19 06:40:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 06:40:18,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:18,939 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] [2022-11-19 06:40:18,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 06:40:19,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 06:40:19,145 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:19,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1184603440, now seen corresponding path program 1 times [2022-11-19 06:40:19,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:19,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997423894] [2022-11-19 06:40:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:19,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:19,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:40:19,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152997501] [2022-11-19 06:40:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:19,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:19,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:19,175 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:19,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 06:40:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:40:19,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 06:40:19,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-19 06:40:19,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:19,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997423894] [2022-11-19 06:40:19,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:40:19,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152997501] [2022-11-19 06:40:19,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152997501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:19,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [398177258] [2022-11-19 06:40:19,468 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 06:40:19,468 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:19,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:19,469 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:19,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:31,542 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2022-11-19 06:40:31,546 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:40:31,561 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:35,529 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5147#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 06:40:35,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:35,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:40:35,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-11-19 06:40:35,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148710152] [2022-11-19 06:40:35,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:35,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 06:40:35,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:35,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 06:40:35,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2022-11-19 06:40:35,531 INFO L87 Difference]: Start difference. First operand 228 states and 271 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-19 06:40:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:35,916 INFO L93 Difference]: Finished difference Result 372 states and 446 transitions. [2022-11-19 06:40:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 06:40:35,917 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 70 [2022-11-19 06:40:35,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:35,919 INFO L225 Difference]: With dead ends: 372 [2022-11-19 06:40:35,919 INFO L226 Difference]: Without dead ends: 352 [2022-11-19 06:40:35,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 06:40:35,921 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 122 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:35,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 288 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:40:35,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-19 06:40:35,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 336. [2022-11-19 06:40:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 209 states have (on average 1.1483253588516746) internal successors, (240), 218 states have internal predecessors, (240), 86 states have call successors, (86), 40 states have call predecessors, (86), 40 states have return successors, (81), 77 states have call predecessors, (81), 81 states have call successors, (81) [2022-11-19 06:40:35,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 407 transitions. [2022-11-19 06:40:35,997 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 407 transitions. Word has length 70 [2022-11-19 06:40:35,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:35,997 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 407 transitions. [2022-11-19 06:40:35,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-19 06:40:35,998 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 407 transitions. [2022-11-19 06:40:35,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 06:40:35,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:35,999 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] [2022-11-19 06:40:36,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:36,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 06:40:36,205 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1938585712, now seen corresponding path program 1 times [2022-11-19 06:40:36,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:36,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694000802] [2022-11-19 06:40:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:36,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:36,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:40:36,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302685238] [2022-11-19 06:40:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:36,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:36,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:36,223 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:36,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 06:40:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:36,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-19 06:40:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-19 06:40:36,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-19 06:40:37,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:37,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694000802] [2022-11-19 06:40:37,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:40:37,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302685238] [2022-11-19 06:40:37,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302685238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:37,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912018849] [2022-11-19 06:40:37,919 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 06:40:37,919 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:37,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:37,920 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:37,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:52,124 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-19 06:40:52,128 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:40:52,142 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:41:01,529 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6649#(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 [2022-11-19 06:41:01,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:41:01,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:41:01,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-11-19 06:41:01,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107575394] [2022-11-19 06:41:01,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:41:01,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 06:41:01,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:41:01,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 06:41:01,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 06:41:01,532 INFO L87 Difference]: Start difference. First operand 336 states and 407 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) [2022-11-19 06:41:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:41:16,335 INFO L93 Difference]: Finished difference Result 458 states and 584 transitions. [2022-11-19 06:41:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 06:41:16,336 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 [2022-11-19 06:41:16,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:41:16,338 INFO L225 Difference]: With dead ends: 458 [2022-11-19 06:41:16,339 INFO L226 Difference]: Without dead ends: 454 [2022-11-19 06:41:16,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=491, Invalid=3799, Unknown=0, NotChecked=0, Total=4290 [2022-11-19 06:41:16,341 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 234 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:41:16,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 554 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-19 06:41:16,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-19 06:41:16,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 424. [2022-11-19 06:41:16,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 266 states have (on average 1.1879699248120301) internal successors, (316), 274 states have internal predecessors, (316), 113 states have call successors, (113), 45 states have call predecessors, (113), 44 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-19 06:41:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 537 transitions. [2022-11-19 06:41:16,462 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 537 transitions. Word has length 71 [2022-11-19 06:41:16,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:41:16,463 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 537 transitions. [2022-11-19 06:41:16,463 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) [2022-11-19 06:41:16,463 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 537 transitions. [2022-11-19 06:41:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 06:41:16,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:41:16,465 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] [2022-11-19 06:41:16,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 06:41:16,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 06:41:16,668 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:41:16,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:41:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1382598768, now seen corresponding path program 1 times [2022-11-19 06:41:16,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:41:16,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395473062] [2022-11-19 06:41:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:16,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:41:16,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:41:16,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898125960] [2022-11-19 06:41:16,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:16,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:16,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:41:16,679 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:41:16,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 06:41:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:16,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 06:41:16,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:41:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 35 proven. 20 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-19 06:41:17,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:41:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-19 06:41:17,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:41:17,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395473062] [2022-11-19 06:41:17,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:41:17,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898125960] [2022-11-19 06:41:17,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898125960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:41:17,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1112719271] [2022-11-19 06:41:17,803 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-19 06:41:17,803 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:41:17,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:41:17,804 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:41:17,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:41:29,479 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2022-11-19 06:41:29,482 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:41:29,497 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:41:34,160 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8479#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 06:41:34,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:41:34,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:41:34,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2022-11-19 06:41:34,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028075620] [2022-11-19 06:41:34,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:41:34,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 06:41:34,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:41:34,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 06:41:34,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 06:41:34,163 INFO L87 Difference]: Start difference. First operand 424 states and 537 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) [2022-11-19 06:41:39,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:41:39,291 INFO L93 Difference]: Finished difference Result 556 states and 710 transitions. [2022-11-19 06:41:39,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 06:41:39,292 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 [2022-11-19 06:41:39,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:41:39,295 INFO L225 Difference]: With dead ends: 556 [2022-11-19 06:41:39,295 INFO L226 Difference]: Without dead ends: 522 [2022-11-19 06:41:39,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=316, Invalid=2336, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 06:41:39,298 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 104 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:41:39,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 268 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-19 06:41:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-11-19 06:41:39,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 453. [2022-11-19 06:41:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 293 states have (on average 1.174061433447099) internal successors, (344), 300 states have internal predecessors, (344), 109 states have call successors, (109), 50 states have call predecessors, (109), 50 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2022-11-19 06:41:39,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 558 transitions. [2022-11-19 06:41:39,448 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 558 transitions. Word has length 76 [2022-11-19 06:41:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:41:39,449 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 558 transitions. [2022-11-19 06:41:39,449 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) [2022-11-19 06:41:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 558 transitions. [2022-11-19 06:41:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 06:41:39,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:41:39,450 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] [2022-11-19 06:41:39,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 06:41:39,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 06:41:39,656 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:41:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:41:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash -698925503, now seen corresponding path program 1 times [2022-11-19 06:41:39,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:41:39,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009197632] [2022-11-19 06:41:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:39,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:41:39,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:41:39,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316898697] [2022-11-19 06:41:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:39,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:39,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:41:39,667 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:41:39,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 06:41:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:39,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 06:41:39,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:41:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 51 proven. 26 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-11-19 06:41:40,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:41:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-11-19 06:41:42,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:41:42,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009197632] [2022-11-19 06:41:42,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:41:42,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316898697] [2022-11-19 06:41:42,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316898697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:41:42,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1908927483] [2022-11-19 06:41:42,214 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-19 06:41:42,214 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:41:42,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:41:42,215 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:41:42,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:41:53,987 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2022-11-19 06:41:53,991 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:41:54,007 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:03,166 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10540#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~counter~0 21) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:03,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:03,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:42:03,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2022-11-19 06:42:03,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872083498] [2022-11-19 06:42:03,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:03,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 06:42:03,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:03,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 06:42:03,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1481, Unknown=1, NotChecked=0, Total=1722 [2022-11-19 06:42:03,169 INFO L87 Difference]: Start difference. First operand 453 states and 558 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) [2022-11-19 06:42:20,263 WARN L233 SmtUtils]: Spent 14.42s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:42:27,056 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 [] [2022-11-19 06:42:45,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:42:50,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:42:52,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:43:07,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:43:13,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:13,131 INFO L93 Difference]: Finished difference Result 584 states and 743 transitions. [2022-11-19 06:43:13,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 06:43:13,131 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 [2022-11-19 06:43:13,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:13,134 INFO L225 Difference]: With dead ends: 584 [2022-11-19 06:43:13,134 INFO L226 Difference]: Without dead ends: 582 [2022-11-19 06:43:13,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=537, Invalid=3001, Unknown=2, NotChecked=0, Total=3540 [2022-11-19 06:43:13,142 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 170 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 195 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:13,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 244 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 948 Invalid, 3 Unknown, 0 Unchecked, 26.5s Time] [2022-11-19 06:43:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-11-19 06:43:13,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 554. [2022-11-19 06:43:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 362 states have (on average 1.1961325966850829) internal successors, (433), 370 states have internal predecessors, (433), 137 states have call successors, (137), 54 states have call predecessors, (137), 54 states have return successors, (133), 129 states have call predecessors, (133), 133 states have call successors, (133) [2022-11-19 06:43:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 703 transitions. [2022-11-19 06:43:13,370 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 703 transitions. Word has length 88 [2022-11-19 06:43:13,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:13,371 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 703 transitions. [2022-11-19 06:43:13,371 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) [2022-11-19 06:43:13,372 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 703 transitions. [2022-11-19 06:43:13,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-19 06:43:13,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:13,373 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:13,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:13,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 06:43:13,579 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:13,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:13,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1250044008, now seen corresponding path program 2 times [2022-11-19 06:43:13,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:13,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384918651] [2022-11-19 06:43:13,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:13,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:13,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:43:13,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510509422] [2022-11-19 06:43:13,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:43:13,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:13,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:13,592 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:13,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 06:43:13,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 06:43:13,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:43:13,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 06:43:13,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-11-19 06:43:13,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:43:13,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:13,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384918651] [2022-11-19 06:43:13,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:43:13,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510509422] [2022-11-19 06:43:13,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510509422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:13,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:13,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:43:13,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744987385] [2022-11-19 06:43:13,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:13,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:43:13,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:13,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:43:13,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:43:13,704 INFO L87 Difference]: Start difference. First operand 554 states and 703 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 06:43:14,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:14,084 INFO L93 Difference]: Finished difference Result 722 states and 935 transitions. [2022-11-19 06:43:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:43:14,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 98 [2022-11-19 06:43:14,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:14,088 INFO L225 Difference]: With dead ends: 722 [2022-11-19 06:43:14,088 INFO L226 Difference]: Without dead ends: 519 [2022-11-19 06:43:14,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:43:14,090 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:14,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-19 06:43:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 494. [2022-11-19 06:43:14,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 319 states have (on average 1.188087774294671) internal successors, (379), 327 states have internal predecessors, (379), 126 states have call successors, (126), 48 states have call predecessors, (126), 48 states have return successors, (123), 118 states have call predecessors, (123), 123 states have call successors, (123) [2022-11-19 06:43:14,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 628 transitions. [2022-11-19 06:43:14,295 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 628 transitions. Word has length 98 [2022-11-19 06:43:14,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:14,296 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 628 transitions. [2022-11-19 06:43:14,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 06:43:14,296 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 628 transitions. [2022-11-19 06:43:14,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-19 06:43:14,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:14,298 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:14,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:14,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 06:43:14,504 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:14,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1144504099, now seen corresponding path program 1 times [2022-11-19 06:43:14,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:14,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621747458] [2022-11-19 06:43:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:14,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:14,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:43:14,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619592261] [2022-11-19 06:43:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:14,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:14,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:14,520 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:14,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 06:43:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:14,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 06:43:14,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 35 proven. 229 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-19 06:43:14,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 35 proven. 37 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-19 06:43:14,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:14,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621747458] [2022-11-19 06:43:14,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:43:14,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619592261] [2022-11-19 06:43:14,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619592261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:14,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1162612438] [2022-11-19 06:43:14,961 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 06:43:14,961 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:14,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:14,961 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:14,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:21,180 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2022-11-19 06:43:21,197 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:43:21,211 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:25,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14963#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:25,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:25,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:43:25,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-11-19 06:43:25,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477262433] [2022-11-19 06:43:25,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:25,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 06:43:25,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:25,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 06:43:25,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1083, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 06:43:25,938 INFO L87 Difference]: Start difference. First operand 494 states and 628 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-19 06:43:27,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:27,216 INFO L93 Difference]: Finished difference Result 1252 states and 1698 transitions. [2022-11-19 06:43:27,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-19 06:43:27,216 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 104 [2022-11-19 06:43:27,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:27,223 INFO L225 Difference]: With dead ends: 1252 [2022-11-19 06:43:27,223 INFO L226 Difference]: Without dead ends: 1132 [2022-11-19 06:43:27,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=509, Invalid=1941, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 06:43:27,226 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 283 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:27,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 365 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:43:27,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-11-19 06:43:27,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1108. [2022-11-19 06:43:27,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 691 states have (on average 1.1765557163531115) internal successors, (813), 708 states have internal predecessors, (813), 320 states have call successors, (320), 96 states have call predecessors, (320), 96 states have return successors, (311), 303 states have call predecessors, (311), 311 states have call successors, (311) [2022-11-19 06:43:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1444 transitions. [2022-11-19 06:43:27,731 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1444 transitions. Word has length 104 [2022-11-19 06:43:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:27,731 INFO L495 AbstractCegarLoop]: Abstraction has 1108 states and 1444 transitions. [2022-11-19 06:43:27,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-19 06:43:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1444 transitions. [2022-11-19 06:43:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 06:43:27,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:27,733 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:27,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:27,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 06:43:27,939 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:27,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:27,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1878404201, now seen corresponding path program 2 times [2022-11-19 06:43:27,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:27,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262772187] [2022-11-19 06:43:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:27,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:27,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:43:27,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953521056] [2022-11-19 06:43:27,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:43:27,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:27,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:27,955 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:27,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 06:43:28,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 06:43:28,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:43:28,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 06:43:28,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2022-11-19 06:43:28,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-11-19 06:43:29,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:29,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262772187] [2022-11-19 06:43:29,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:43:29,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953521056] [2022-11-19 06:43:29,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953521056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:29,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1595948139] [2022-11-19 06:43:29,869 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-19 06:43:29,869 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:29,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:29,869 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:29,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:41,552 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2022-11-19 06:43:41,556 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:43:41,573 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:47,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19165#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~counter~0 21) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:47,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:47,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:43:47,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2022-11-19 06:43:47,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383863637] [2022-11-19 06:43:47,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:47,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 06:43:47,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:47,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 06:43:47,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 06:43:47,689 INFO L87 Difference]: Start difference. First operand 1108 states and 1444 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-19 06:44:10,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:10,700 INFO L93 Difference]: Finished difference Result 1688 states and 2278 transitions. [2022-11-19 06:44:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 06:44:10,700 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) Word has length 106 [2022-11-19 06:44:10,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:10,712 INFO L225 Difference]: With dead ends: 1688 [2022-11-19 06:44:10,712 INFO L226 Difference]: Without dead ends: 1686 [2022-11-19 06:44:10,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=702, Invalid=4554, Unknown=0, NotChecked=0, Total=5256 [2022-11-19 06:44:10,715 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 143 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:10,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 654 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2022-11-19 06:44:10,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2022-11-19 06:44:11,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1572. [2022-11-19 06:44:11,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 967 states have (on average 1.1985522233712513) internal successors, (1159), 984 states have internal predecessors, (1159), 480 states have call successors, (480), 124 states have call predecessors, (480), 124 states have return successors, (471), 463 states have call predecessors, (471), 471 states have call successors, (471) [2022-11-19 06:44:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2110 transitions. [2022-11-19 06:44:11,640 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2110 transitions. Word has length 106 [2022-11-19 06:44:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:11,640 INFO L495 AbstractCegarLoop]: Abstraction has 1572 states and 2110 transitions. [2022-11-19 06:44:11,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-19 06:44:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2110 transitions. [2022-11-19 06:44:11,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-19 06:44:11,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:11,644 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:11,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:11,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 06:44:11,850 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:11,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1268150453, now seen corresponding path program 3 times [2022-11-19 06:44:11,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:11,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722557179] [2022-11-19 06:44:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:11,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:11,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:44:11,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991231652] [2022-11-19 06:44:11,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:44:11,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:11,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:11,881 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:11,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 06:44:11,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:44:11,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:44:11,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-19 06:44:11,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 57 proven. 59 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-11-19 06:44:12,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:44:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 65 proven. 48 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-11-19 06:44:15,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:15,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722557179] [2022-11-19 06:44:15,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:44:15,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991231652] [2022-11-19 06:44:15,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991231652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:44:15,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2147293249] [2022-11-19 06:44:15,196 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-19 06:44:15,196 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:44:15,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:44:15,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:44:15,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:44:29,172 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-19 06:44:29,175 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:44:29,190 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:44:38,085 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24839#(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 [2022-11-19 06:44:38,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:44:38,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:44:38,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2022-11-19 06:44:38,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144364000] [2022-11-19 06:44:38,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:44:38,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 06:44:38,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:38,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 06:44:38,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2022-11-19 06:44:38,089 INFO L87 Difference]: Start difference. First operand 1572 states and 2110 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 24 states have internal predecessors, (62), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2022-11-19 06:44:54,309 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 [] [2022-11-19 06:45:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:07,960 INFO L93 Difference]: Finished difference Result 1957 states and 2610 transitions. [2022-11-19 06:45:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-19 06:45:07,960 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 24 states have internal predecessors, (62), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) Word has length 110 [2022-11-19 06:45:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:07,969 INFO L225 Difference]: With dead ends: 1957 [2022-11-19 06:45:07,969 INFO L226 Difference]: Without dead ends: 1953 [2022-11-19 06:45:07,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=859, Invalid=5460, Unknown=1, NotChecked=0, Total=6320 [2022-11-19 06:45:07,973 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 288 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 373 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:07,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 384 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1355 Invalid, 1 Unknown, 0 Unchecked, 11.9s Time] [2022-11-19 06:45:07,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2022-11-19 06:45:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1837. [2022-11-19 06:45:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1145 states have (on average 1.1965065502183405) internal successors, (1370), 1166 states have internal predecessors, (1370), 535 states have call successors, (535), 157 states have call predecessors, (535), 156 states have return successors, (526), 513 states have call predecessors, (526), 526 states have call successors, (526) [2022-11-19 06:45:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 2431 transitions. [2022-11-19 06:45:09,235 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 2431 transitions. Word has length 110 [2022-11-19 06:45:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:09,235 INFO L495 AbstractCegarLoop]: Abstraction has 1837 states and 2431 transitions. [2022-11-19 06:45:09,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 24 states have internal predecessors, (62), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2022-11-19 06:45:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 2431 transitions. [2022-11-19 06:45:09,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 06:45:09,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:09,238 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:09,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 06:45:09,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:45:09,443 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:09,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:09,444 INFO L85 PathProgramCache]: Analyzing trace with hash -600095698, now seen corresponding path program 3 times [2022-11-19 06:45:09,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:09,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096339663] [2022-11-19 06:45:09,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:09,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:09,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:45:09,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091826518] [2022-11-19 06:45:09,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:45:09,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:45:09,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:45:09,458 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:45:09,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 06:45:09,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:45:09,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:45:09,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-19 06:45:09,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:45:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 32 proven. 55 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2022-11-19 06:45:10,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:45:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-11-19 06:45:13,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:45:13,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096339663] [2022-11-19 06:45:13,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:45:13,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091826518] [2022-11-19 06:45:13,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091826518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:45:13,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1058572239] [2022-11-19 06:45:13,597 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 06:45:13,598 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:45:13,598 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:45:13,598 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:45:13,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:45:26,831 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-19 06:45:26,838 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:45:26,852 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:45:39,358 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31349#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~counter~0 21) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:45:39,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:45:39,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:45:39,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2022-11-19 06:45:39,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355698896] [2022-11-19 06:45:39,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:45:39,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 06:45:39,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:45:39,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 06:45:39,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2198, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 06:45:39,361 INFO L87 Difference]: Start difference. First operand 1837 states and 2431 transitions. Second operand has 27 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 14 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2022-11-19 06:46:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:46:54,185 INFO L93 Difference]: Finished difference Result 2196 states and 2931 transitions. [2022-11-19 06:46:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-19 06:46:54,186 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 14 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) Word has length 121 [2022-11-19 06:46:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:46:54,196 INFO L225 Difference]: With dead ends: 2196 [2022-11-19 06:46:54,197 INFO L226 Difference]: Without dead ends: 2161 [2022-11-19 06:46:54,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3510 ImplicationChecksByTransitivity, 52.0s TimeCoverageRelationStatistics Valid=1462, Invalid=9455, Unknown=3, NotChecked=0, Total=10920 [2022-11-19 06:46:54,201 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 380 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 2568 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 3058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 2568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:46:54,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1140 Invalid, 3058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 2568 Invalid, 0 Unknown, 0 Unchecked, 36.1s Time] [2022-11-19 06:46:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2022-11-19 06:46:55,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 2008. [2022-11-19 06:46:55,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 1252 states have (on average 1.1956869009584665) internal successors, (1497), 1272 states have internal predecessors, (1497), 583 states have call successors, (583), 173 states have call predecessors, (583), 172 states have return successors, (574), 562 states have call predecessors, (574), 574 states have call successors, (574) [2022-11-19 06:46:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 2654 transitions. [2022-11-19 06:46:55,701 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 2654 transitions. Word has length 121 [2022-11-19 06:46:55,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:46:55,702 INFO L495 AbstractCegarLoop]: Abstraction has 2008 states and 2654 transitions. [2022-11-19 06:46:55,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 14 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2022-11-19 06:46:55,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 2654 transitions. [2022-11-19 06:46:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-19 06:46:55,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:46:55,705 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:46:55,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 06:46:55,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:46:55,911 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:46:55,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:46:55,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1584885405, now seen corresponding path program 4 times [2022-11-19 06:46:55,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:46:55,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788576556] [2022-11-19 06:46:55,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:46:55,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:46:55,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:46:55,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413476304] [2022-11-19 06:46:55,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:46:55,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:46:55,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:46:55,921 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:46:55,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 06:46:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:57,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-19 06:46:57,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:47:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 131 proven. 89 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-19 06:47:07,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:47:31,332 WARN L233 SmtUtils]: Spent 7.53s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:47:36,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:47:36,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788576556] [2022-11-19 06:47:36,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:47:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413476304] [2022-11-19 06:47:36,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413476304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:47:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1478151408] [2022-11-19 06:47:36,985 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-19 06:47:36,986 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:47:36,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:47:36,986 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:47:36,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:47:50,959 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-19 06:47:50,963 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:47:50,978 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:48:09,918 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38507#(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 [2022-11-19 06:48:09,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:48:09,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:48:09,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-19 06:48:09,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553521247] [2022-11-19 06:48:09,919 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-19 06:48:09,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 06:48:09,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:09,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 06:48:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=2505, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 06:48:09,921 INFO L87 Difference]: Start difference. First operand 2008 states and 2654 transitions. Second operand has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-19 06:48:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:16,190 INFO L93 Difference]: Finished difference Result 2085 states and 2714 transitions. [2022-11-19 06:48:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 06:48:16,191 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 138 [2022-11-19 06:48:16,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:16,201 INFO L225 Difference]: With dead ends: 2085 [2022-11-19 06:48:16,201 INFO L226 Difference]: Without dead ends: 2081 [2022-11-19 06:48:16,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 321 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=485, Invalid=3421, Unknown=0, NotChecked=0, Total=3906 [2022-11-19 06:48:16,204 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 71 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:16,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 375 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-19 06:48:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2022-11-19 06:48:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 2071. [2022-11-19 06:48:17,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1300 states have (on average 1.1876923076923076) internal successors, (1544), 1319 states have internal predecessors, (1544), 582 states have call successors, (582), 189 states have call predecessors, (582), 188 states have return successors, (574), 562 states have call predecessors, (574), 574 states have call successors, (574) [2022-11-19 06:48:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2700 transitions. [2022-11-19 06:48:17,694 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2700 transitions. Word has length 138 [2022-11-19 06:48:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:17,695 INFO L495 AbstractCegarLoop]: Abstraction has 2071 states and 2700 transitions. [2022-11-19 06:48:17,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-19 06:48:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2700 transitions. [2022-11-19 06:48:17,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-19 06:48:17,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:17,699 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:48:17,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 06:48:17,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:17,908 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:17,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:17,909 INFO L85 PathProgramCache]: Analyzing trace with hash 393851770, now seen corresponding path program 4 times [2022-11-19 06:48:17,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:17,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179883003] [2022-11-19 06:48:17,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:17,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:17,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:48:17,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727537221] [2022-11-19 06:48:17,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:48:17,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:17,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:48:17,923 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:48:17,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 06:48:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:18,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-19 06:48:18,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:48:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 40 proven. 76 refuted. 0 times theorem prover too weak. 769 trivial. 0 not checked. [2022-11-19 06:48:19,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:48:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 40 proven. 73 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2022-11-19 06:48:21,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:21,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179883003] [2022-11-19 06:48:21,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:48:21,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727537221] [2022-11-19 06:48:21,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727537221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:48:21,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1845046844] [2022-11-19 06:48:21,420 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 06:48:21,420 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:48:21,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:48:21,420 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:48:21,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:48:33,428 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2022-11-19 06:48:33,431 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:48:33,446 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:48:40,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45569#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 06:48:40,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:48:40,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:48:40,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2022-11-19 06:48:40,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510746873] [2022-11-19 06:48:40,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:48:40,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 06:48:40,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:40,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 06:48:40,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1911, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 06:48:40,664 INFO L87 Difference]: Start difference. First operand 2071 states and 2700 transitions. Second operand has 26 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 16 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2022-11-19 06:49:39,594 WARN L233 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 72 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:49:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:42,405 INFO L93 Difference]: Finished difference Result 2230 states and 2907 transitions. [2022-11-19 06:49:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-19 06:49:42,406 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 16 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) Word has length 140 [2022-11-19 06:49:42,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:42,418 INFO L225 Difference]: With dead ends: 2230 [2022-11-19 06:49:42,419 INFO L226 Difference]: Without dead ends: 2199 [2022-11-19 06:49:42,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=980, Invalid=6330, Unknown=0, NotChecked=0, Total=7310 [2022-11-19 06:49:42,421 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 268 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 2956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:42,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 980 Invalid, 2956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 28.1s Time] [2022-11-19 06:49:42,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2022-11-19 06:49:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2140. [2022-11-19 06:49:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 1340 states have (on average 1.1835820895522389) internal successors, (1586), 1359 states have internal predecessors, (1586), 605 states have call successors, (605), 194 states have call predecessors, (605), 194 states have return successors, (598), 586 states have call predecessors, (598), 598 states have call successors, (598) [2022-11-19 06:49:44,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2789 transitions. [2022-11-19 06:49:44,082 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2789 transitions. Word has length 140 [2022-11-19 06:49:44,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:44,083 INFO L495 AbstractCegarLoop]: Abstraction has 2140 states and 2789 transitions. [2022-11-19 06:49:44,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 16 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2022-11-19 06:49:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2789 transitions. [2022-11-19 06:49:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-19 06:49:44,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:44,087 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:44,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:44,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 06:49:44,293 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:44,293 INFO L85 PathProgramCache]: Analyzing trace with hash 408986690, now seen corresponding path program 2 times [2022-11-19 06:49:44,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:44,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622918359] [2022-11-19 06:49:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:44,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:44,303 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:49:44,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447327143] [2022-11-19 06:49:44,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:49:44,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:44,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:44,314 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:44,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 06:49:44,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 06:49:44,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:49:44,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:49:44,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 40 proven. 728 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-19 06:49:44,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:49:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 40 proven. 88 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2022-11-19 06:49:44,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:44,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622918359] [2022-11-19 06:49:44,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:49:44,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447327143] [2022-11-19 06:49:44,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447327143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:49:44,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146873203] [2022-11-19 06:49:44,887 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 06:49:44,887 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:49:44,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:49:44,888 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:49:44,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:49:59,351 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-19 06:49:59,355 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:49:59,370 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:50:07,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '53057#(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 [2022-11-19 06:50:07,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:50:07,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:50:07,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2022-11-19 06:50:07,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558853835] [2022-11-19 06:50:07,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:50:07,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 06:50:07,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:07,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 06:50:07,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=1544, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 06:50:07,761 INFO L87 Difference]: Start difference. First operand 2140 states and 2789 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2022-11-19 06:50:11,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:11,143 INFO L93 Difference]: Finished difference Result 3273 states and 4358 transitions. [2022-11-19 06:50:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 06:50:11,143 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) Word has length 147 [2022-11-19 06:50:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:11,157 INFO L225 Difference]: With dead ends: 3273 [2022-11-19 06:50:11,157 INFO L226 Difference]: Without dead ends: 3239 [2022-11-19 06:50:11,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=749, Invalid=2911, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 06:50:11,160 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 534 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:11,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 528 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:50:11,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2022-11-19 06:50:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 3178. [2022-11-19 06:50:13,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 1979 states have (on average 1.182920667003537) internal successors, (2341), 2017 states have internal predecessors, (2341), 924 states have call successors, (924), 274 states have call predecessors, (924), 274 states have return successors, (911), 886 states have call predecessors, (911), 911 states have call successors, (911) [2022-11-19 06:50:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4176 transitions. [2022-11-19 06:50:13,691 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4176 transitions. Word has length 147 [2022-11-19 06:50:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:13,691 INFO L495 AbstractCegarLoop]: Abstraction has 3178 states and 4176 transitions. [2022-11-19 06:50:13,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2022-11-19 06:50:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4176 transitions. [2022-11-19 06:50:13,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-19 06:50:13,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:13,695 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:13,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 06:50:13,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 06:50:13,901 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:13,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:13,901 INFO L85 PathProgramCache]: Analyzing trace with hash 526567797, now seen corresponding path program 5 times [2022-11-19 06:50:13,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:13,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696333859] [2022-11-19 06:50:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:13,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:13,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:50:13,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182360750] [2022-11-19 06:50:13,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:50:13,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:13,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:50:13,916 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:50:13,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 06:50:14,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 06:50:14,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:50:14,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-19 06:50:14,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:50:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 164 proven. 100 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2022-11-19 06:50:17,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:50:27,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:27,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696333859] [2022-11-19 06:50:27,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:50:27,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182360750] [2022-11-19 06:50:27,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182360750] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:50:27,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807999326] [2022-11-19 06:50:27,020 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-19 06:50:27,020 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:50:27,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:50:27,020 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:50:27,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:50:41,348 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-19 06:50:41,351 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:50:41,367 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:50:55,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '63446#(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 [2022-11-19 06:50:55,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:50:55,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:50:55,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-19 06:50:55,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823965083] [2022-11-19 06:50:55,712 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-19 06:50:55,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 06:50:55,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:55,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 06:50:55,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2067, Unknown=1, NotChecked=0, Total=2352 [2022-11-19 06:50:55,713 INFO L87 Difference]: Start difference. First operand 3178 states and 4176 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-11-19 06:51:00,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:00,187 INFO L93 Difference]: Finished difference Result 3580 states and 4679 transitions. [2022-11-19 06:51:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 06:51:00,187 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 161 [2022-11-19 06:51:00,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:00,203 INFO L225 Difference]: With dead ends: 3580 [2022-11-19 06:51:00,204 INFO L226 Difference]: Without dead ends: 3576 [2022-11-19 06:51:00,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=358, Invalid=2611, Unknown=1, NotChecked=0, Total=2970 [2022-11-19 06:51:00,206 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 60 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:00,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 252 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 06:51:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2022-11-19 06:51:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3531. [2022-11-19 06:51:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 2190 states have (on average 1.1789954337899544) internal successors, (2582), 2228 states have internal predecessors, (2582), 1026 states have call successors, (1026), 315 states have call predecessors, (1026), 314 states have return successors, (1013), 987 states have call predecessors, (1013), 1013 states have call successors, (1013) [2022-11-19 06:51:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 4621 transitions. [2022-11-19 06:51:02,672 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 4621 transitions. Word has length 161 [2022-11-19 06:51:02,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:02,672 INFO L495 AbstractCegarLoop]: Abstraction has 3531 states and 4621 transitions. [2022-11-19 06:51:02,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-11-19 06:51:02,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 4621 transitions. [2022-11-19 06:51:02,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-19 06:51:02,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:02,676 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:02,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:02,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 06:51:02,884 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:02,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1081908013, now seen corresponding path program 6 times [2022-11-19 06:51:02,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:02,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594628990] [2022-11-19 06:51:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:02,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:02,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:51:02,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923061885] [2022-11-19 06:51:02,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:51:02,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:02,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:02,894 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:02,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d280c15-b8e0-44f1-bbcd-ac4ef633224c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 06:51:03,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:51:03,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:51:03,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-19 06:51:03,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 251 proven. 189 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2022-11-19 06:51:06,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:21,696 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse8 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (or (not (= (+ .cse0 .cse1) (+ |c_ULTIMATE.start_main_~c~0#1| .cse2 .cse3))) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|) .cse4 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) .cse5 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) .cse6 .cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| .cse8 .cse9 .cse2 .cse3) (+ .cse0 .cse1 |c_ULTIMATE.start_main_~b~0#1|))) (<= (+ |c_ULTIMATE.start_main_~c~0#1| .cse0 .cse1) (+ .cse8 .cse9 .cse2 .cse3)) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| .cse6 .cse7 .cse2 .cse3) (+ .cse4 (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) .cse0 .cse5 .cse1))))) is different from true [2022-11-19 06:51:32,701 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse8 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (or (not (= (+ .cse0 .cse1) (+ |c_ULTIMATE.start_main_~c~0#1| .cse2 .cse3))) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|) .cse4 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) .cse5 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) .cse6 .cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| .cse8 .cse9 .cse2 .cse3) (+ .cse0 .cse1 |c_ULTIMATE.start_main_~b~0#1|))) (<= (+ |c_ULTIMATE.start_main_~c~0#1| .cse0 .cse1) (+ .cse8 .cse9 .cse2 .cse3)) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| .cse6 .cse7 .cse2 .cse3) (+ .cse4 (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) .cse0 .cse5 .cse1))))) is different from true [2022-11-19 06:51:58,894 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse2 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (or (not (= (+ .cse0 .cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (+ .cse2 .cse3 |c_ULTIMATE.start_main_~b~0#1|))) (not (= (+ .cse4 .cse5) (+ |c_ULTIMATE.start_main_~c~0#1| .cse6 .cse7))) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|) .cse8 .cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) .cse9 .cse3) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) .cse10 .cse11 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| .cse0 .cse1 .cse6 .cse7) (+ .cse4 .cse5 |c_ULTIMATE.start_main_~b~0#1|))) (<= (+ |c_ULTIMATE.start_main_~c~0#1| .cse4 .cse5) (+ .cse0 .cse1 .cse6 .cse7)) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| .cse10 .cse11 .cse6 .cse7) (+ .cse8 (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) .cse4 .cse9 .cse5))))) is different from true [2022-11-19 06:52:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 307 proven. 62 refuted. 0 times theorem prover too weak. 816 trivial. 6 not checked. [2022-11-19 06:52:07,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:52:07,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594628990] [2022-11-19 06:52:07,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:52:07,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923061885] [2022-11-19 06:52:07,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923061885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:52:07,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1752199888] [2022-11-19 06:52:07,813 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-19 06:52:07,814 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:52:07,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:52:07,814 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:52:07,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:52:19,853 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2022-11-19 06:52:19,861 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-19 06:52:19,875 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:52:37,670 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75074#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~counter~0 21) (= |#NULL.base| 0))' at error location [2022-11-19 06:52:37,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:52:37,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:52:37,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2022-11-19 06:52:37,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172227242] [2022-11-19 06:52:37,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:52:37,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 06:52:37,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:52:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 06:52:37,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=2206, Unknown=7, NotChecked=300, Total=2862 [2022-11-19 06:52:37,673 INFO L87 Difference]: Start difference. First operand 3531 states and 4621 transitions. Second operand has 33 states, 29 states have (on average 2.586206896551724) internal successors, (75), 25 states have internal predecessors, (75), 16 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (48), 18 states have call predecessors, (48), 15 states have call successors, (48) [2022-11-19 06:52:40,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 06:52:43,717 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 []