./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i --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_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/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_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/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_25c1f5d2-5c64-4233-b899-0d2aa1016b17/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 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 --- 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 07:57:34,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:57:34,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:57:34,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:57:34,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:57:34,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:57:34,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:57:34,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:57:34,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:57:34,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:57:34,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:57:34,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:57:34,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:57:34,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:57:34,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:57:34,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:57:34,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:57:34,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:57:34,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:57:34,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:57:34,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:57:34,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:57:34,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:57:34,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:57:34,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:57:34,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:57:34,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:57:34,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:57:34,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:57:34,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:57:34,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:57:34,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:57:34,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:57:34,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:57:34,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:57:34,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:57:34,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:57:34,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:57:34,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:57:34,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:57:34,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:57:34,860 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:57:34,883 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:57:34,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:57:34,883 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:57:34,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:57:34,884 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:57:34,884 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:57:34,885 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:57:34,885 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:57:34,885 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:57:34,885 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:57:34,885 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:57:34,886 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:57:34,886 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:57:34,886 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:57:34,886 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:57:34,886 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:57:34,887 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:57:34,887 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:57:34,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:57:34,888 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:57:34,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:57:34,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:57:34,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:57:34,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:57:34,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:57:34,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:57:34,889 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:57:34,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:57:34,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:57:34,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:57:34,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:57:34,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:57:34,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:57:34,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:57:34,891 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:57:34,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:57:34,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:57:34,892 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:57:34,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:57:34,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:57:34,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:57:34,892 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_25c1f5d2-5c64-4233-b899-0d2aa1016b17/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 [2022-11-19 07:57:35,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:57:35,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:57:35,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:57:35,200 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:57:35,201 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:57:35,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2022-11-19 07:57:35,290 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/data/4e28b3a6d/e8fe80c7932c43f79993adc80a398325/FLAGaf2e47489 [2022-11-19 07:57:35,883 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:57:35,883 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2022-11-19 07:57:35,896 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/data/4e28b3a6d/e8fe80c7932c43f79993adc80a398325/FLAGaf2e47489 [2022-11-19 07:57:36,218 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/data/4e28b3a6d/e8fe80c7932c43f79993adc80a398325 [2022-11-19 07:57:36,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:57:36,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:57:36,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:57:36,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:57:36,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:57:36,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:36" (1/1) ... [2022-11-19 07:57:36,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e31ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36, skipping insertion in model container [2022-11-19 07:57:36,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:36" (1/1) ... [2022-11-19 07:57:36,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:57:36,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:57:36,455 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_25c1f5d2-5c64-4233-b899-0d2aa1016b17/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i[950,963] [2022-11-19 07:57:36,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:57:36,483 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:57:36,497 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_25c1f5d2-5c64-4233-b899-0d2aa1016b17/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i[950,963] [2022-11-19 07:57:36,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:57:36,520 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:57:36,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36 WrapperNode [2022-11-19 07:57:36,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:57:36,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:57:36,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:57:36,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:57:36,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2022-11-19 07:57:36,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2022-11-19 07:57:36,559 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-11-19 07:57:36,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:57:36,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:57:36,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:57:36,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:57:36,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2022-11-19 07:57:36,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2022-11-19 07:57:36,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2022-11-19 07:57:36,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2022-11-19 07:57:36,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2022-11-19 07:57:36,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2022-11-19 07:57:36,581 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2022-11-19 07:57:36,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2022-11-19 07:57:36,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:57:36,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:57:36,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:57:36,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:57:36,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (1/1) ... [2022-11-19 07:57:36,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:57:36,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:36,621 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:57:36,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:57:36,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:57:36,653 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:57:36,653 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:57:36,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:57:36,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:57:36,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:57:36,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:57:36,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:57:36,722 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:57:36,724 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:57:36,868 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:57:36,901 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:57:36,901 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:57:36,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:36 BoogieIcfgContainer [2022-11-19 07:57:36,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:57:36,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:57:36,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:57:36,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:57:36,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:57:36" (1/3) ... [2022-11-19 07:57:36,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46df5f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:36, skipping insertion in model container [2022-11-19 07:57:36,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:36" (2/3) ... [2022-11-19 07:57:36,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46df5f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:36, skipping insertion in model container [2022-11-19 07:57:36,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:36" (3/3) ... [2022-11-19 07:57:36,913 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound50.i [2022-11-19 07:57:36,932 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:57:36,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:57:36,981 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:57:36,988 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;@153f0db5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:57:36,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:57:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:57:37,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:57:37,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:37,003 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:37,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:37,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:37,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1734137638, now seen corresponding path program 1 times [2022-11-19 07:57:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:37,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220659488] [2022-11-19 07:57:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:37,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:37,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:37,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220659488] [2022-11-19 07:57:37,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 07:57:37,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869723835] [2022-11-19 07:57:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:37,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:37,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:37,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:37,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:57:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:37,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-19 07:57:37,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:57:37,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:57:37,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869723835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:37,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:37,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:57:37,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989506199] [2022-11-19 07:57:37,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:37,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:57:37,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:37,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:57:37,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:57:37,342 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:57:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:37,403 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2022-11-19 07:57:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:57:37,408 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-19 07:57:37,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:37,417 INFO L225 Difference]: With dead ends: 35 [2022-11-19 07:57:37,417 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 07:57:37,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 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 07:57:37,428 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:37,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:57:37,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 07:57:37,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-19 07:57:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:57:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-11-19 07:57:37,489 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 14 [2022-11-19 07:57:37,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:37,491 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-11-19 07:57:37,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:57:37,492 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-11-19 07:57:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 07:57:37,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:37,495 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:37,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:57:37,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 07:57:37,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:37,703 INFO L85 PathProgramCache]: Analyzing trace with hash -207211284, now seen corresponding path program 1 times [2022-11-19 07:57:37,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:37,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124517411] [2022-11-19 07:57:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:37,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:37,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:37,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124517411] [2022-11-19 07:57:37,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 07:57:37,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670579473] [2022-11-19 07:57:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:37,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:37,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:37,795 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:37,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:57:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:37,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:57:37,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:57:37,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:57:37,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670579473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:37,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:37,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:57:38,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111920329] [2022-11-19 07:57:38,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:38,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:57:38,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:38,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:57:38,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:57:38,003 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:57:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:38,033 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-19 07:57:38,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:57:38,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-11-19 07:57:38,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:38,035 INFO L225 Difference]: With dead ends: 33 [2022-11-19 07:57:38,035 INFO L226 Difference]: Without dead ends: 22 [2022-11-19 07:57:38,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 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 07:57:38,037 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:38,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:57:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-19 07:57:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-19 07:57:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:57:38,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-19 07:57:38,044 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2022-11-19 07:57:38,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:38,045 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-19 07:57:38,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:57:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-19 07:57:38,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:57:38,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:38,047 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:38,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 07:57:38,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:38,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:38,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:38,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1776102932, now seen corresponding path program 1 times [2022-11-19 07:57:38,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:38,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6738456] [2022-11-19 07:57:38,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:38,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:38,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:57:38,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91678232] [2022-11-19 07:57:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:38,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:38,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:38,281 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:38,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:57:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:38,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:57:38,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:57:38,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:57:38,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:38,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6738456] [2022-11-19 07:57:38,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:57:38,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91678232] [2022-11-19 07:57:38,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91678232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:38,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:38,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 07:57:38,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680254462] [2022-11-19 07:57:38,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:38,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:57:38,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:38,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:57:38,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:57:38,710 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:57:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:38,899 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-11-19 07:57:38,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:57:38,900 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-19 07:57:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:38,901 INFO L225 Difference]: With dead ends: 34 [2022-11-19 07:57:38,902 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 07:57:38,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:57:38,904 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:38,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 74 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:57:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 07:57:38,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-19 07:57:38,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:57:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-19 07:57:38,914 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2022-11-19 07:57:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:38,915 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-19 07:57:38,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:57:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-19 07:57:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 07:57:38,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:38,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:38,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:57:39,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:39,123 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:39,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:39,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1737998361, now seen corresponding path program 1 times [2022-11-19 07:57:39,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:39,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094313663] [2022-11-19 07:57:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:39,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:39,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:57:39,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909430035] [2022-11-19 07:57:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:39,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:39,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:39,140 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:39,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:57:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:39,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:57:39,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:57:39,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:57:39,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:39,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094313663] [2022-11-19 07:57:39,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:57:39,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909430035] [2022-11-19 07:57:39,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909430035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:39,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [486276731] [2022-11-19 07:57:39,367 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 07:57:39,367 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:57:39,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:57:39,379 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:57:39,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:57:40,034 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2022-11-19 07:57:40,063 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-19 07:57:40,113 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:57:41,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '538#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (< ~counter~0 51) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:57:41,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:57:41,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:57:41,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-19 07:57:41,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195381463] [2022-11-19 07:57:41,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:57:41,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:57:41,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:41,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:57:41,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:57:41,427 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:57:41,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:41,585 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-11-19 07:57:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:57:41,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2022-11-19 07:57:41,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:41,593 INFO L225 Difference]: With dead ends: 62 [2022-11-19 07:57:41,593 INFO L226 Difference]: Without dead ends: 51 [2022-11-19 07:57:41,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:57:41,595 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:41,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 95 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:57:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-19 07:57:41,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-11-19 07:57:41,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:57:41,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-11-19 07:57:41,616 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 19 [2022-11-19 07:57:41,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:41,618 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-11-19 07:57:41,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:57:41,619 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-11-19 07:57:41,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:57:41,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:41,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:41,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:57:41,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:41,828 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:41,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:41,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1948059783, now seen corresponding path program 1 times [2022-11-19 07:57:41,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:41,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720284662] [2022-11-19 07:57:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:41,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:41,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:57:41,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415290265] [2022-11-19 07:57:41,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:41,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:41,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:41,862 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:41,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:57:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:41,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:57:41,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:57:42,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:57:42,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:42,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720284662] [2022-11-19 07:57:42,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:57:42,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415290265] [2022-11-19 07:57:42,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415290265] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:57:42,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:57:42,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-19 07:57:42,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182705506] [2022-11-19 07:57:42,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:42,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:57:42,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:42,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:57:42,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:57:42,382 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:57:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:42,428 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-11-19 07:57:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:57:42,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-11-19 07:57:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:42,434 INFO L225 Difference]: With dead ends: 49 [2022-11-19 07:57:42,434 INFO L226 Difference]: Without dead ends: 47 [2022-11-19 07:57:42,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:57:42,442 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:42,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 98 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-11-19 07:57:42,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-19 07:57:42,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-11-19 07:57:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 37 states have internal predecessors, (44), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:57:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-11-19 07:57:42,474 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 20 [2022-11-19 07:57:42,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:42,475 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-11-19 07:57:42,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:57:42,476 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-11-19 07:57:42,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:57:42,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:42,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:42,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 07:57:42,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:42,683 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:42,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:42,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1946272323, now seen corresponding path program 1 times [2022-11-19 07:57:42,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:42,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643222029] [2022-11-19 07:57:42,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:42,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:42,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:57:42,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890311485] [2022-11-19 07:57:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:42,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:42,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:42,697 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:42,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:57:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:42,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:57:42,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:57:42,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:57:42,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:42,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643222029] [2022-11-19 07:57:42,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:57:42,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890311485] [2022-11-19 07:57:42,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890311485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:42,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1321391928] [2022-11-19 07:57:42,865 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 07:57:42,866 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:57:42,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:57:42,866 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:57:42,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:57:43,157 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-19 07:57:43,180 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-19 07:57:43,205 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:57:44,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1081#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 51 ~counter~0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:57:44,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:57:44,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:57:44,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-19 07:57:44,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597277294] [2022-11-19 07:57:44,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:57:44,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:57:44,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:44,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:57:44,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:57:44,478 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:57:44,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:44,719 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2022-11-19 07:57:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:57:44,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2022-11-19 07:57:44,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:44,724 INFO L225 Difference]: With dead ends: 116 [2022-11-19 07:57:44,725 INFO L226 Difference]: Without dead ends: 109 [2022-11-19 07:57:44,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:57:44,728 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:44,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 119 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:57:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-19 07:57:44,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2022-11-19 07:57:44,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.236842105263158) internal successors, (94), 84 states have internal predecessors, (94), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:57:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2022-11-19 07:57:44,773 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 20 [2022-11-19 07:57:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:44,773 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2022-11-19 07:57:44,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:57:44,774 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2022-11-19 07:57:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 07:57:44,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:44,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:44,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:57:44,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:57:44,983 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:44,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1825805005, now seen corresponding path program 1 times [2022-11-19 07:57:44,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:44,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976131695] [2022-11-19 07:57:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:44,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:44,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:57:45,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117081718] [2022-11-19 07:57:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:45,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:45,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:45,006 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:45,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:57:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:45,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:57:45,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:57:45,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:57:45,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:45,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976131695] [2022-11-19 07:57:45,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:57:45,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117081718] [2022-11-19 07:57:45,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117081718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:45,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:45,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:57:45,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212846326] [2022-11-19 07:57:45,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:45,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:57:45,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:57:45,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:57:45,090 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:57:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:45,136 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2022-11-19 07:57:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:57:45,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-19 07:57:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:45,138 INFO L225 Difference]: With dead ends: 139 [2022-11-19 07:57:45,138 INFO L226 Difference]: Without dead ends: 89 [2022-11-19 07:57:45,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:57:45,140 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:45,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:57:45,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-19 07:57:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-19 07:57:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 73 states have internal predecessors, (83), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:57:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-11-19 07:57:45,174 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 25 [2022-11-19 07:57:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:45,175 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-11-19 07:57:45,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:57:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-11-19 07:57:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 07:57:45,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:45,180 INFO L195 NwaCegarLoop]: trace histogram [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 07:57:45,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:57:45,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:45,386 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:45,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:45,386 INFO L85 PathProgramCache]: Analyzing trace with hash -687200305, now seen corresponding path program 1 times [2022-11-19 07:57:45,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:45,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188483759] [2022-11-19 07:57:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:45,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:45,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:57:45,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924139978] [2022-11-19 07:57:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:45,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:45,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:45,417 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:45,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:57:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:45,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:57:45,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:57:45,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:57:45,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:45,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188483759] [2022-11-19 07:57:45,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:57:45,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924139978] [2022-11-19 07:57:45,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924139978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:45,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759004100] [2022-11-19 07:57:45,624 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:57:45,624 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:57:45,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:57:45,625 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:57:45,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:57:46,011 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2022-11-19 07:57:46,115 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-19 07:57:46,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:57:47,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1964#(and (<= 2 ~counter~0) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (< ~counter~0 51) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:57:47,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:57:47,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:57:47,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-19 07:57:47,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132300087] [2022-11-19 07:57:47,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:57:47,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:57:47,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:47,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:57:47,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:57:47,647 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:57:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:47,953 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2022-11-19 07:57:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:57:47,959 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-11-19 07:57:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:47,960 INFO L225 Difference]: With dead ends: 104 [2022-11-19 07:57:47,960 INFO L226 Difference]: Without dead ends: 84 [2022-11-19 07:57:47,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:57:47,962 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:47,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 87 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:57:47,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-19 07:57:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-19 07:57:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 69 states have internal predecessors, (77), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:57:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2022-11-19 07:57:47,977 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 26 [2022-11-19 07:57:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:47,977 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2022-11-19 07:57:47,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:57:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2022-11-19 07:57:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:57:47,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:47,979 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:47,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:57:48,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:48,185 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:48,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:48,185 INFO L85 PathProgramCache]: Analyzing trace with hash -810539866, now seen corresponding path program 1 times [2022-11-19 07:57:48,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:48,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668637834] [2022-11-19 07:57:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:48,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:48,198 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:57:48,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909024728] [2022-11-19 07:57:48,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:48,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:48,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:48,200 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:48,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:57:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:48,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:57:48,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:57:49,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:57:52,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:52,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668637834] [2022-11-19 07:57:52,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:57:52,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909024728] [2022-11-19 07:57:52,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909024728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:52,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1880408754] [2022-11-19 07:57:52,139 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-19 07:57:52,140 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:57:52,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:57:52,140 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:57:52,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:57:53,531 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2022-11-19 07:57:53,554 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-19 07:57:53,574 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:57:55,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2425#(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 07:57:55,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:57:55,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:57:55,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-11-19 07:57:55,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754548517] [2022-11-19 07:57:55,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:57:55,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:57:55,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:55,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:57:55,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:57:55,343 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 07:58:07,383 WARN L233 SmtUtils]: Spent 11.31s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:58:10,396 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 07:58:12,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:58:14,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:58:25,102 WARN L233 SmtUtils]: Spent 9.34s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:58:31,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:58:33,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:58:37,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:58:39,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:58:39,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:39,584 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2022-11-19 07:58:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:58:39,585 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-11-19 07:58:39,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:39,587 INFO L225 Difference]: With dead ends: 118 [2022-11-19 07:58:39,587 INFO L226 Difference]: Without dead ends: 116 [2022-11-19 07:58:39,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=202, Invalid=1519, Unknown=1, NotChecked=0, Total=1722 [2022-11-19 07:58:39,589 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 29 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:39,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 189 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 156 Invalid, 5 Unknown, 10 Unchecked, 18.3s Time] [2022-11-19 07:58:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-19 07:58:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2022-11-19 07:58:39,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 75 states have internal predecessors, (83), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 07:58:39,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2022-11-19 07:58:39,616 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 28 [2022-11-19 07:58:39,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:39,617 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2022-11-19 07:58:39,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 07:58:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2022-11-19 07:58:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:58:39,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:39,618 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:39,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-19 07:58:39,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 07:58:39,823 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:58:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:39,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1953882091, now seen corresponding path program 1 times [2022-11-19 07:58:39,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:39,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317810265] [2022-11-19 07:58:39,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:39,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:39,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:58:39,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487395929] [2022-11-19 07:58:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:39,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:39,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:39,852 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:39,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:58:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:39,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:58:39,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:58:40,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:58:40,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:40,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317810265] [2022-11-19 07:58:40,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:58:40,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487395929] [2022-11-19 07:58:40,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487395929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:40,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1170328764] [2022-11-19 07:58:40,152 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 07:58:40,152 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:58:40,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:58:40,153 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:58:40,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:58:40,387 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2022-11-19 07:58:40,399 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-19 07:58:40,424 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:58:41,412 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2952#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 51 ~counter~0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:58:41,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:58:41,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:58:41,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2022-11-19 07:58:41,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195821552] [2022-11-19 07:58:41,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:41,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:58:41,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:41,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:58:41,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:58:41,415 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:58:41,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:41,897 INFO L93 Difference]: Finished difference Result 240 states and 275 transitions. [2022-11-19 07:58:41,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 07:58:41,898 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-11-19 07:58:41,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:41,900 INFO L225 Difference]: With dead ends: 240 [2022-11-19 07:58:41,900 INFO L226 Difference]: Without dead ends: 220 [2022-11-19 07:58:41,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:58:41,902 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 167 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:41,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 156 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:58:41,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-19 07:58:41,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 113. [2022-11-19 07:58:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.173913043478261) internal successors, (108), 95 states have internal predecessors, (108), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 07:58:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2022-11-19 07:58:41,939 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 31 [2022-11-19 07:58:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:41,940 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2022-11-19 07:58:41,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:58:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2022-11-19 07:58:41,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 07:58:41,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:41,941 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:41,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:42,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:58:42,148 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:58:42,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:42,149 INFO L85 PathProgramCache]: Analyzing trace with hash -777460733, now seen corresponding path program 2 times [2022-11-19 07:58:42,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:42,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812747510] [2022-11-19 07:58:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:42,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:42,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:58:42,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535714452] [2022-11-19 07:58:42,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:58:42,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:42,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:42,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:42,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:58:42,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 07:58:42,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:58:42,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:58:42,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 07:58:42,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:58:42,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:42,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812747510] [2022-11-19 07:58:42,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:58:42,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535714452] [2022-11-19 07:58:42,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535714452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:58:42,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:58:42,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:58:42,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458658663] [2022-11-19 07:58:42,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:58:42,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:58:42,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:42,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:58:42,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:58:42,360 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:58:42,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:42,646 INFO L93 Difference]: Finished difference Result 128 states and 143 transitions. [2022-11-19 07:58:42,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:58:42,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-11-19 07:58:42,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:42,648 INFO L225 Difference]: With dead ends: 128 [2022-11-19 07:58:42,648 INFO L226 Difference]: Without dead ends: 121 [2022-11-19 07:58:42,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:58:42,649 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:42,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:58:42,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-19 07:58:42,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2022-11-19 07:58:42,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 90 states have (on average 1.1666666666666667) internal successors, (105), 93 states have internal predecessors, (105), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 07:58:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2022-11-19 07:58:42,676 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 32 [2022-11-19 07:58:42,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:42,677 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2022-11-19 07:58:42,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:58:42,677 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2022-11-19 07:58:42,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 07:58:42,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:42,678 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:42,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:42,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:42,883 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:58:42,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:42,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1487974853, now seen corresponding path program 2 times [2022-11-19 07:58:42,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:42,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734754107] [2022-11-19 07:58:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:42,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:42,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:58:42,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196014319] [2022-11-19 07:58:42,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:58:42,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:42,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:42,905 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:42,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:58:43,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:58:43,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:58:43,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:58:43,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:58:44,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:58:44,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:44,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734754107] [2022-11-19 07:58:44,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:58:44,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196014319] [2022-11-19 07:58:44,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196014319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:44,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1489251399] [2022-11-19 07:58:44,863 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-19 07:58:44,863 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:58:44,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:58:44,864 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:58:44,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:58:45,872 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-19 07:58:45,921 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2022-11-19 07:58:45,942 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:58:47,432 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4127#(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 07:58:47,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:58:47,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:58:47,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2022-11-19 07:58:47,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556333365] [2022-11-19 07:58:47,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:47,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:58:47,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:47,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:58:47,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:58:47,435 INFO L87 Difference]: Start difference. First operand 111 states and 126 transitions. Second operand has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-19 07:58:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:48,894 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2022-11-19 07:58:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:58:48,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 36 [2022-11-19 07:58:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:48,896 INFO L225 Difference]: With dead ends: 125 [2022-11-19 07:58:48,897 INFO L226 Difference]: Without dead ends: 88 [2022-11-19 07:58:48,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:58:48,898 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:48,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 90 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 07:58:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-19 07:58:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-19 07:58:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 73 states have (on average 1.178082191780822) internal successors, (86), 75 states have internal predecessors, (86), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:58:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2022-11-19 07:58:48,922 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 36 [2022-11-19 07:58:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:48,923 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2022-11-19 07:58:48,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-19 07:58:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2022-11-19 07:58:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 07:58:48,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:48,924 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:48,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:49,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:49,130 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:58:49,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:49,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1031037811, now seen corresponding path program 3 times [2022-11-19 07:58:49,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:49,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037408789] [2022-11-19 07:58:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:49,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:49,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:58:49,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542143769] [2022-11-19 07:58:49,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:58:49,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:49,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:49,144 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:49,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25c1f5d2-5c64-4233-b899-0d2aa1016b17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:59:05,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:59:05,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:59:05,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 07:59:05,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:41,207 WARN L233 SmtUtils]: Spent 9.87s on a formula simplification. DAG size of input: 39 DAG size of output: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:01:13,478 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (and (let ((.cse0 (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse1))) (or (and (= 0 |c_ULTIMATE.start_main_~q~0#1|) (= |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~A~0#1|) (not .cse0)) (and .cse0 (= 1 |c_ULTIMATE.start_main_~q~0#1|) (= (+ |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~A~0#1|)))) (exists ((|aux_div_aux_div_aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_177_290| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375| Int) (|aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_138| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415_264_276_1358| Int) (|aux_mod_aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_150| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415_264_276| Int) (|aux_div_aux_div_v_ULTIMATE.start_main_~b~0#1_84_41_52| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156| Int) (|aux_div_aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_150| Int) (|aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_138| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415_264_276_1358_667| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144| Int) (|aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415_264_276_1358_667_313_2059| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97| Int)) (let ((.cse33 (* |aux_div_aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_150| 34359738368)) (.cse17 (* 2 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156|)) (.cse4 (* 2 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108|)) (.cse18 (* 2 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144|)) (.cse13 (* 2 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120|)) (.cse19 (* 2 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132|)) (.cse8 (* 8 |aux_div_aux_div_aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_177_290|)) (.cse9 (* |aux_mod_aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_150| 8)) (.cse37 (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180| 4)) (.cse30 (* |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415_264_276_1358_667_313_2059| 4294967296)) (.cse38 (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673| 4)) (.cse31 (* 2 |c_ULTIMATE.start_main_~b~0#1|)) (.cse34 (* 2 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97|)) (.cse39 (* 4 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375|)) (.cse32 (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470| 4))) (let ((.cse14 (+ .cse37 .cse30 .cse38 .cse31 .cse34 .cse39 .cse32)) (.cse2 (* 4 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415_264_276_1358|)) (.cse3 (* 4 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415_264_276_1358_667|)) (.cse5 (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415_264_276| 4)) (.cse15 (+ 2 .cse8 .cse9)) (.cse28 (+ .cse37 .cse30 .cse38 .cse31 .cse34 .cse39 .cse32 (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86| 2))) (.cse29 (+ .cse17 .cse4 .cse18 .cse13 .cse19 .cse8 .cse9)) (.cse16 (+ .cse30 .cse38 .cse31 .cse32)) (.cse26 (* 17179869184 |aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_138|)) (.cse27 (* |aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_138| 4)) (.cse7 (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415| 4)) (.cse25 (+ .cse33 .cse30 .cse31)) (.cse6 (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888| 4)) (.cse10 (+ .cse30 .cse31)) (.cse24 (+ .cse8 .cse9)) (.cse35 (* |aux_mod_aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_150| 4)) (.cse11 (* 2 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180|)) (.cse36 (* 4 |aux_div_aux_div_aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_177_290|)) (.cse20 (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415_264_276| 2)) (.cse21 (* 2 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888|)) (.cse22 (* 2 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415_264_276_1358|)) (.cse23 (* 2 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415|)) (.cse12 (+ .cse37 .cse30 .cse38 .cse31 .cse39 .cse32))) (and (<= (+ .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9) .cse10) (<= 0 (+ .cse11 1)) (< .cse12 (+ .cse4 .cse13 2 .cse8 .cse9)) (< .cse14 .cse15) (< .cse16 (+ .cse17 .cse4 .cse18 .cse13 .cse19 4 .cse8 .cse9)) (<= 0 (+ .cse20 .cse21 .cse22 .cse23 1)) (<= .cse24 .cse14) (< .cse12 (+ .cse4 .cse18 .cse13 2 .cse19 .cse8 .cse9)) (< .cse25 (+ .cse26 .cse4 .cse13 .cse27 .cse6 .cse19 4)) (< .cse10 (+ .cse4 .cse18 .cse13 .cse6 .cse7 .cse19 4 .cse8 .cse9)) (< .cse28 .cse15) (< .cse1 (* (mod (+ (* 2147483647 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108|) (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415_264_276| 2147483646) (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415_264_276_1358| 2147483646) (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415_264_276_1358_667| 2147483646) (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888| 2147483646) |c_ULTIMATE.start_main_~b~0#1| (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375_673_470_228_888_415| 2147483646)) 2147483648) 2)) (<= .cse29 .cse12) (<= (+ .cse4 .cse13 .cse19 .cse8 .cse9) .cse12) (< .cse10 (+ .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 4 .cse8 .cse9)) (< .cse12 .cse15) (<= .cse24 .cse10) (<= (+ .cse4 .cse18 .cse13 .cse19 .cse8 .cse9) .cse12) (< .cse12 (+ .cse4 .cse13 2 .cse19 .cse8 .cse9)) (<= |aux_mod_aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_150| .cse1) (< (+ .cse30 .cse31 .cse32) (+ .cse4 .cse13 4 .cse8 .cse9)) (<= .cse24 .cse28) (<= (+ .cse4 .cse13 (* |aux_div_aux_div_v_ULTIMATE.start_main_~b~0#1_84_41_52| 16)) (+ .cse33 .cse30 .cse31 .cse32)) (<= .cse20 0) (<= (mod (+ (div (+ .cse31 .cse34 .cse8 .cse9 (* (- 4) (div (+ .cse31 .cse34) 4))) 16) (* |aux_div_aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_150| 2147483648)) 4294967296) .cse1) (<= 0 (+ .cse20 1)) (< .cse10 (+ 4 .cse8 .cse9)) (<= (+ .cse4 .cse8 .cse9) .cse12) (<= (mod (+ (* 4294967295 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144|) .cse35 (* 4294967295 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97|) .cse36 (* 4294967294 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180_375|) (* 4294967295 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132|) (* 4294967295 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156|) (* 4294967295 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108|) (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86| 4294967295) (* 4294967295 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120|) (* 4294967294 |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_75_86_97_108_120_132_144_156_168_180|)) 4294967296) .cse1) (<= .cse29 .cse16) (< .cse12 (+ .cse17 .cse4 .cse18 .cse13 2 .cse19 .cse8 .cse9)) (< .cse12 (+ .cse4 2 .cse8 .cse9)) (<= (+ .cse26 .cse4 .cse18 .cse13 .cse27 .cse6 .cse7 .cse19) .cse25) (<= 0 |aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_138|) (<= (+ .cse4 .cse13 .cse6 .cse19 .cse8 .cse9) .cse10) (<= |aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_138| .cse1) (<= (+ .cse20 .cse21 .cse22 .cse23) 0) (<= 0 |aux_mod_aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_150|) (<= .cse24 .cse12) (<= (+ .cse35 .cse36 (* 17179869184 |aux_div_aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~b~0#1_84_41_52_129_150|)) (+ .cse20 3 (* |aux_div_aux_div_v_ULTIMATE.start_main_~b~0#1_84_41_52| 8))) (<= .cse11 .cse36) (<= .cse36 (+ .cse20 3 .cse21 .cse22 .cse23)) (<= (+ .cse4 .cse13 .cse8 .cse9) .cse12))))) (<= 0 |c_ULTIMATE.start_main_~b~0#1|) (< |c_ULTIMATE.start_main_~b~0#1| 2147483648))) is different from false [2022-11-19 08:03:21,094 WARN L233 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 15 DAG size of output: 1 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 08:03:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-11-19 08:03:41,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:27,806 WARN L233 SmtUtils]: Spent 1.28m on a formula simplification. DAG size of input: 6827 DAG size of output: 6824 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)