./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 04:47:51,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 04:47:51,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 04:47:51,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 04:47:51,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 04:47:51,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 04:47:51,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 04:47:51,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 04:47:51,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 04:47:51,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 04:47:51,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 04:47:51,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 04:47:51,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 04:47:51,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 04:47:51,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 04:47:51,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 04:47:51,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 04:47:51,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 04:47:51,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 04:47:51,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 04:47:51,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 04:47:51,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 04:47:51,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 04:47:51,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 04:47:51,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 04:47:51,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 04:47:51,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 04:47:51,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 04:47:51,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 04:47:51,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 04:47:51,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 04:47:51,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 04:47:51,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 04:47:51,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 04:47:51,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 04:47:51,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 04:47:51,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 04:47:51,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 04:47:51,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 04:47:51,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 04:47:51,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 04:47:51,048 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 04:47:51,064 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 04:47:51,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 04:47:51,064 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 04:47:51,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 04:47:51,065 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 04:47:51,065 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 04:47:51,065 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 04:47:51,065 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 04:47:51,066 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 04:47:51,066 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 04:47:51,066 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 04:47:51,066 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 04:47:51,066 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 04:47:51,066 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 04:47:51,066 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 04:47:51,067 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 04:47:51,067 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 04:47:51,067 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 04:47:51,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 04:47:51,068 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 04:47:51,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 04:47:51,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 04:47:51,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 04:47:51,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 04:47:51,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 04:47:51,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 04:47:51,069 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 04:47:51,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 04:47:51,069 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 04:47:51,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 04:47:51,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 04:47:51,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 04:47:51,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:47:51,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 04:47:51,070 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 04:47:51,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 04:47:51,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 04:47:51,071 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 04:47:51,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 04:47:51,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 04:47:51,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 04:47:51,071 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_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 [2022-12-14 04:47:51,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 04:47:51,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 04:47:51,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 04:47:51,259 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 04:47:51,260 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 04:47:51,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-12-14 04:47:53,804 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 04:47:53,919 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 04:47:53,919 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-12-14 04:47:53,924 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/data/b48c4ebcd/9c1a0ac455d64c819c512bf23365eb7e/FLAGf16e27802 [2022-12-14 04:47:53,934 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/data/b48c4ebcd/9c1a0ac455d64c819c512bf23365eb7e [2022-12-14 04:47:53,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 04:47:53,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 04:47:53,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 04:47:53,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 04:47:53,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 04:47:53,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:47:53" (1/1) ... [2022-12-14 04:47:53,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f432cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:47:53, skipping insertion in model container [2022-12-14 04:47:53,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:47:53" (1/1) ... [2022-12-14 04:47:53,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 04:47:53,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:47:54,078 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2022-12-14 04:47:54,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:47:54,106 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 04:47:54,114 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2022-12-14 04:47:54,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:47:54,129 INFO L208 MainTranslator]: Completed translation [2022-12-14 04:47:54,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:47:54 WrapperNode [2022-12-14 04:47:54,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 04:47:54,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 04:47:54,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 04:47:54,131 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 04:47:54,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:47:54" (1/1) ... [2022-12-14 04:47:54,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:47:54" (1/1) ... [2022-12-14 04:47:54,156 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-12-14 04:47:54,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 04:47:54,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 04:47:54,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 04:47:54,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 04:47:54,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:47:54" (1/1) ... [2022-12-14 04:47:54,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:47:54" (1/1) ... [2022-12-14 04:47:54,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:47:54" (1/1) ... [2022-12-14 04:47:54,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:47:54" (1/1) ... [2022-12-14 04:47:54,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:47:54" (1/1) ... [2022-12-14 04:47:54,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:47:54" (1/1) ... [2022-12-14 04:47:54,176 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:47:54" (1/1) ... [2022-12-14 04:47:54,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:47:54" (1/1) ... [2022-12-14 04:47:54,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 04:47:54,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 04:47:54,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 04:47:54,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 04:47:54,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:47:54" (1/1) ... [2022-12-14 04:47:54,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:47:54,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:54,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 04:47:54,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 04:47:54,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 04:47:54,239 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 04:47:54,239 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 04:47:54,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 04:47:54,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 04:47:54,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 04:47:54,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 04:47:54,240 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 04:47:54,297 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 04:47:54,299 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 04:47:54,441 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 04:47:54,458 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 04:47:54,458 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 04:47:54,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:47:54 BoogieIcfgContainer [2022-12-14 04:47:54,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 04:47:54,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 04:47:54,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 04:47:54,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 04:47:54,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:47:53" (1/3) ... [2022-12-14 04:47:54,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26771ab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:47:54, skipping insertion in model container [2022-12-14 04:47:54,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:47:54" (2/3) ... [2022-12-14 04:47:54,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26771ab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:47:54, skipping insertion in model container [2022-12-14 04:47:54,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:47:54" (3/3) ... [2022-12-14 04:47:54,466 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2022-12-14 04:47:54,480 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 04:47:54,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 04:47:54,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 04:47:54,522 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;@7a9c50d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 04:47:54,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 04:47:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 04:47:54,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 04:47:54,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:54,533 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:47:54,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:47:54,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:54,538 INFO L85 PathProgramCache]: Analyzing trace with hash 966807424, now seen corresponding path program 1 times [2022-12-14 04:47:54,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:47:54,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102924815] [2022-12-14 04:47:54,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:54,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:47:54,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:47:54,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187527470] [2022-12-14 04:47:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:54,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:54,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:54,633 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:47:54,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 04:47:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:54,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 04:47:54,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 04:47:54,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:47:54,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:47:54,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102924815] [2022-12-14 04:47:54,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:47:54,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187527470] [2022-12-14 04:47:54,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187527470] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:47:54,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:47:54,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 04:47:54,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337006039] [2022-12-14 04:47:54,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:47:54,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 04:47:54,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:47:54,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 04:47:54,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 04:47:54,785 INFO L87 Difference]: Start difference. First operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 04:47:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:47:54,815 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2022-12-14 04:47:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 04:47:54,817 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 26 [2022-12-14 04:47:54,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:47:54,823 INFO L225 Difference]: With dead ends: 49 [2022-12-14 04:47:54,823 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 04:47:54,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 04:47:54,830 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:47:54,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:47:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 04:47:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-14 04:47:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 04:47:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-12-14 04:47:54,863 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 26 [2022-12-14 04:47:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:47:54,865 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-12-14 04:47:54,865 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 04:47:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-12-14 04:47:54,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 04:47:54,866 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:54,867 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:47:54,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 04:47:55,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 04:47:55,068 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:47:55,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1643993843, now seen corresponding path program 1 times [2022-12-14 04:47:55,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:47:55,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676928675] [2022-12-14 04:47:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:55,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:47:55,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:47:55,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219668492] [2022-12-14 04:47:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:55,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:55,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:55,085 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:47:55,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 04:47:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:55,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 04:47:55,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 04:47:55,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:47:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 04:47:55,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:47:55,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676928675] [2022-12-14 04:47:55,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:47:55,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219668492] [2022-12-14 04:47:55,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219668492] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:47:55,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1876383204] [2022-12-14 04:47:55,308 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 04:47:55,308 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:47:55,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:47:55,316 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:47:55,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:47:55,870 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-12-14 04:47:55,883 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:47:56,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1876383204] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:47:56,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 04:47:56,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5] total 14 [2022-12-14 04:47:56,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757572694] [2022-12-14 04:47:56,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:47:56,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 04:47:56,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:47:56,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 04:47:56,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-12-14 04:47:56,628 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 04:47:56,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:47:56,785 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-12-14 04:47:56,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 04:47:56,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2022-12-14 04:47:56,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:47:56,786 INFO L225 Difference]: With dead ends: 38 [2022-12-14 04:47:56,786 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 04:47:56,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-12-14 04:47:56,787 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:47:56,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 48 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:47:56,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 04:47:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 04:47:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 04:47:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-12-14 04:47:56,796 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 27 [2022-12-14 04:47:56,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:47:56,796 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-12-14 04:47:56,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 04:47:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-12-14 04:47:56,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 04:47:56,797 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:56,797 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:47:56,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 04:47:56,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:56,999 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:47:57,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:57,001 INFO L85 PathProgramCache]: Analyzing trace with hash -575116102, now seen corresponding path program 1 times [2022-12-14 04:47:57,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:47:57,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815619425] [2022-12-14 04:47:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:57,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:47:57,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:47:57,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057850255] [2022-12-14 04:47:57,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:57,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:57,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:57,043 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:47:57,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 04:47:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:57,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:47:57,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 04:47:57,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:47:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 04:47:57,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:47:57,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815619425] [2022-12-14 04:47:57,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:47:57,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057850255] [2022-12-14 04:47:57,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057850255] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 04:47:57,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:47:57,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-12-14 04:47:57,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637609336] [2022-12-14 04:47:57,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:47:57,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:47:57,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:47:57,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:47:57,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 04:47:57,264 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 04:47:57,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:47:57,389 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-12-14 04:47:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 04:47:57,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 28 [2022-12-14 04:47:57,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:47:57,391 INFO L225 Difference]: With dead ends: 36 [2022-12-14 04:47:57,391 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 04:47:57,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:47:57,392 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:47:57,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:47:57,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 04:47:57,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-12-14 04:47:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 04:47:57,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-12-14 04:47:57,403 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2022-12-14 04:47:57,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:47:57,404 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-12-14 04:47:57,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 04:47:57,404 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-12-14 04:47:57,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 04:47:57,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:57,404 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:47:57,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 04:47:57,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:57,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:47:57,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:57,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1810277145, now seen corresponding path program 1 times [2022-12-14 04:47:57,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:47:57,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431405969] [2022-12-14 04:47:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:57,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:47:57,645 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:47:57,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522146982] [2022-12-14 04:47:57,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:57,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:57,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:57,649 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:47:57,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 04:47:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:57,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 04:47:57,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 04:47:57,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:47:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 04:47:57,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:47:57,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431405969] [2022-12-14 04:47:57,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:47:57,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522146982] [2022-12-14 04:47:57,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522146982] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 04:47:57,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:47:57,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2022-12-14 04:47:57,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777182291] [2022-12-14 04:47:57,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:47:57,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:47:57,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:47:57,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:47:57,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:47:57,969 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:47:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:47:58,053 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-12-14 04:47:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 04:47:58,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2022-12-14 04:47:58,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:47:58,054 INFO L225 Difference]: With dead ends: 47 [2022-12-14 04:47:58,054 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 04:47:58,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-12-14 04:47:58,055 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:47:58,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:47:58,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 04:47:58,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-12-14 04:47:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 04:47:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2022-12-14 04:47:58,074 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 33 [2022-12-14 04:47:58,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:47:58,074 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2022-12-14 04:47:58,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:47:58,074 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2022-12-14 04:47:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 04:47:58,075 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:58,075 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:47:58,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 04:47:58,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:58,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:47:58,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:58,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1313498982, now seen corresponding path program 1 times [2022-12-14 04:47:58,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:47:58,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690094767] [2022-12-14 04:47:58,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:58,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:47:58,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:47:58,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623698477] [2022-12-14 04:47:58,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:58,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:58,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:58,305 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:47:58,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 04:47:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:58,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 04:47:58,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 04:47:58,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:47:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 04:47:58,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:47:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690094767] [2022-12-14 04:47:58,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:47:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623698477] [2022-12-14 04:47:58,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623698477] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 04:47:58,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:47:58,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 15 [2022-12-14 04:47:58,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298982232] [2022-12-14 04:47:58,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:47:58,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 04:47:58,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:47:58,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 04:47:58,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-12-14 04:47:58,778 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 04:47:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:47:58,911 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2022-12-14 04:47:58,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 04:47:58,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 38 [2022-12-14 04:47:58,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:47:58,912 INFO L225 Difference]: With dead ends: 51 [2022-12-14 04:47:58,913 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 04:47:58,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-14 04:47:58,913 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:47:58,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:47:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 04:47:58,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-12-14 04:47:58,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 04:47:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-12-14 04:47:58,925 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 38 [2022-12-14 04:47:58,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:47:58,925 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-12-14 04:47:58,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 04:47:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-12-14 04:47:58,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 04:47:58,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:58,926 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:47:58,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 04:47:59,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:59,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:47:59,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:59,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1793667961, now seen corresponding path program 1 times [2022-12-14 04:47:59,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:47:59,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483909333] [2022-12-14 04:47:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:59,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:47:59,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:47:59,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299365063] [2022-12-14 04:47:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:59,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:59,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:59,181 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:47:59,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 04:47:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:59,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 04:47:59,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 04:47:59,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:47:59,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:47:59,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483909333] [2022-12-14 04:47:59,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:47:59,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299365063] [2022-12-14 04:47:59,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299365063] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:47:59,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [212345945] [2022-12-14 04:47:59,514 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 04:47:59,514 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:47:59,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:47:59,515 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:47:59,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:48:00,168 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-12-14 04:48:00,176 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-12-14 04:48:00,188 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:48:01,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [212345945] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:48:01,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:48:01,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10] total 22 [2022-12-14 04:48:01,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143585168] [2022-12-14 04:48:01,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:48:01,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 04:48:01,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:48:01,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 04:48:01,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-12-14 04:48:01,939 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 04:48:02,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:02,355 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2022-12-14 04:48:02,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 04:48:02,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 43 [2022-12-14 04:48:02,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:02,357 INFO L225 Difference]: With dead ends: 73 [2022-12-14 04:48:02,357 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 04:48:02,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-12-14 04:48:02,359 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:02,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 04:48:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 04:48:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-12-14 04:48:02,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-14 04:48:02,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-12-14 04:48:02,385 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 43 [2022-12-14 04:48:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:02,385 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-12-14 04:48:02,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 04:48:02,385 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-12-14 04:48:02,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 04:48:02,387 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:02,388 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:48:02,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 04:48:02,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:02,588 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:02,589 INFO L85 PathProgramCache]: Analyzing trace with hash 434944611, now seen corresponding path program 1 times [2022-12-14 04:48:02,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:02,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174939038] [2022-12-14 04:48:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:02,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:02,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:48:02,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023539145] [2022-12-14 04:48:02,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:02,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:02,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:48:02,608 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:48:02,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 04:48:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:02,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 04:48:02,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:48:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 04:48:02,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:48:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 04:48:02,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:02,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174939038] [2022-12-14 04:48:02,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:48:02,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023539145] [2022-12-14 04:48:02,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023539145] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:48:02,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [475317591] [2022-12-14 04:48:02,736 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-12-14 04:48:02,736 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:48:02,736 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:48:02,736 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:48:02,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:48:10,931 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 04:48:10,938 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-12-14 04:48:10,948 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:48:13,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2208#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 04:48:13,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:48:13,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 04:48:13,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-12-14 04:48:13,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58742862] [2022-12-14 04:48:13,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 04:48:13,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 04:48:13,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:48:13,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 04:48:13,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-12-14 04:48:13,937 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 04:48:14,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:14,096 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2022-12-14 04:48:14,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 04:48:14,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2022-12-14 04:48:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:14,097 INFO L225 Difference]: With dead ends: 111 [2022-12-14 04:48:14,097 INFO L226 Difference]: Without dead ends: 103 [2022-12-14 04:48:14,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 14 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2022-12-14 04:48:14,098 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 34 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:14,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 177 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:48:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-12-14 04:48:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2022-12-14 04:48:14,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-12-14 04:48:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2022-12-14 04:48:14,118 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 52 [2022-12-14 04:48:14,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:14,118 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2022-12-14 04:48:14,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 04:48:14,118 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2022-12-14 04:48:14,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 04:48:14,119 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:14,119 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:48:14,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 04:48:14,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:14,321 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:14,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:14,322 INFO L85 PathProgramCache]: Analyzing trace with hash -243308457, now seen corresponding path program 1 times [2022-12-14 04:48:14,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:14,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289472651] [2022-12-14 04:48:14,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:14,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:14,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:48:14,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914293623] [2022-12-14 04:48:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:14,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:14,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:48:14,339 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:48:14,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 04:48:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:14,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 04:48:14,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:48:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 04:48:14,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:48:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 04:48:14,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:14,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289472651] [2022-12-14 04:48:14,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:48:14,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914293623] [2022-12-14 04:48:14,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914293623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:48:14,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [634277203] [2022-12-14 04:48:14,565 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 04:48:14,565 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:48:14,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:48:14,566 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:48:14,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:48:22,438 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-12-14 04:48:22,443 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-12-14 04:48:22,453 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:48:26,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [634277203] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:48:26,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 04:48:26,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [9, 7] total 28 [2022-12-14 04:48:26,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170293987] [2022-12-14 04:48:26,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:48:26,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 04:48:26,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:48:26,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 04:48:26,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-12-14 04:48:26,134 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-12-14 04:48:27,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:27,036 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2022-12-14 04:48:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 04:48:27,037 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 58 [2022-12-14 04:48:27,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:27,038 INFO L225 Difference]: With dead ends: 113 [2022-12-14 04:48:27,038 INFO L226 Difference]: Without dead ends: 111 [2022-12-14 04:48:27,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 130 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-12-14 04:48:27,038 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:27,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 58 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 04:48:27,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-14 04:48:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-12-14 04:48:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 36 states have call successors, (36), 11 states have call predecessors, (36), 11 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-12-14 04:48:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2022-12-14 04:48:27,063 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 58 [2022-12-14 04:48:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:27,063 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2022-12-14 04:48:27,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-12-14 04:48:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2022-12-14 04:48:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 04:48:27,064 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:27,064 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:48:27,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 04:48:27,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:27,265 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:27,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1984692712, now seen corresponding path program 1 times [2022-12-14 04:48:27,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:27,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997422108] [2022-12-14 04:48:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:27,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:27,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:48:27,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949210091] [2022-12-14 04:48:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:27,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:27,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:48:27,280 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:48:27,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 04:48:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:27,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 04:48:27,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:48:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-12-14 04:48:27,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:48:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-12-14 04:48:27,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:27,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997422108] [2022-12-14 04:48:27,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:48:27,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949210091] [2022-12-14 04:48:27,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949210091] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:48:27,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [666440646] [2022-12-14 04:48:27,496 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 04:48:27,496 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:48:27,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:48:27,497 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:48:27,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:48:31,082 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2022-12-14 04:48:31,112 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-12-14 04:48:31,122 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:48:34,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3657#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 04:48:34,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:48:34,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 04:48:34,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-12-14 04:48:34,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84405773] [2022-12-14 04:48:34,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 04:48:34,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 04:48:34,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:48:34,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 04:48:34,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-12-14 04:48:34,845 INFO L87 Difference]: Start difference. First operand 111 states and 144 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-12-14 04:48:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:35,120 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2022-12-14 04:48:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 04:48:35,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 65 [2022-12-14 04:48:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:35,122 INFO L225 Difference]: With dead ends: 122 [2022-12-14 04:48:35,122 INFO L226 Difference]: Without dead ends: 120 [2022-12-14 04:48:35,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 157 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-12-14 04:48:35,123 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:35,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 103 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:48:35,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-14 04:48:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-12-14 04:48:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 69 states have internal predecessors, (77), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2022-12-14 04:48:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2022-12-14 04:48:35,151 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 65 [2022-12-14 04:48:35,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:35,152 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2022-12-14 04:48:35,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-12-14 04:48:35,152 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2022-12-14 04:48:35,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 04:48:35,153 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:35,153 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:48:35,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 04:48:35,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 04:48:35,354 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:35,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:35,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2003369438, now seen corresponding path program 1 times [2022-12-14 04:48:35,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:35,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122121513] [2022-12-14 04:48:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:35,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:35,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:48:35,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878661241] [2022-12-14 04:48:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:35,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:35,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:48:35,395 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:48:35,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 04:48:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:35,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 04:48:35,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:48:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-12-14 04:48:35,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:48:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-12-14 04:48:36,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:36,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122121513] [2022-12-14 04:48:36,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:48:36,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878661241] [2022-12-14 04:48:36,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878661241] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:48:36,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1247674084] [2022-12-14 04:48:36,482 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-12-14 04:48:36,482 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:48:36,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:48:36,483 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:48:36,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:48:39,388 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2022-12-14 04:48:39,421 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-12-14 04:48:39,433 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:49:04,238 WARN L233 SmtUtils]: Spent 21.25s on a formula simplification. DAG size of input: 180 DAG size of output: 147 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:49:26,563 WARN L233 SmtUtils]: Spent 13.83s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:49:41,337 WARN L233 SmtUtils]: Spent 12.62s on a formula simplification. DAG size of input: 178 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:49:41,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4509#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 04:49:41,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:49:41,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 04:49:41,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-12-14 04:49:41,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134267629] [2022-12-14 04:49:41,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 04:49:41,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 04:49:41,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:49:41,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 04:49:41,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 04:49:41,367 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-12-14 04:49:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:49:49,914 INFO L93 Difference]: Finished difference Result 199 states and 279 transitions. [2022-12-14 04:49:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 04:49:49,915 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 74 [2022-12-14 04:49:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:49:49,916 INFO L225 Difference]: With dead ends: 199 [2022-12-14 04:49:49,916 INFO L226 Difference]: Without dead ends: 197 [2022-12-14 04:49:49,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 172 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 66.6s TimeCoverageRelationStatistics Valid=440, Invalid=3100, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 04:49:49,917 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 96 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:49:49,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 314 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-14 04:49:49,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-12-14 04:49:49,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2022-12-14 04:49:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 101 states have internal predecessors, (121), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2022-12-14 04:49:49,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 266 transitions. [2022-12-14 04:49:49,997 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 266 transitions. Word has length 74 [2022-12-14 04:49:49,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:49:49,997 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 266 transitions. [2022-12-14 04:49:49,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-12-14 04:49:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 266 transitions. [2022-12-14 04:49:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 04:49:49,998 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:49:49,998 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:49:50,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 04:49:50,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:49:50,199 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:49:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:49:50,199 INFO L85 PathProgramCache]: Analyzing trace with hash -134461569, now seen corresponding path program 1 times [2022-12-14 04:49:50,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:49:50,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367687575] [2022-12-14 04:49:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:49:50,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:49:50,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:49:50,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766959573] [2022-12-14 04:49:50,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:49:50,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:49:50,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:49:50,217 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:49:50,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 04:49:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:49:50,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 04:49:50,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:49:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 39 proven. 16 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 04:49:50,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:49:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-12-14 04:49:51,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:49:51,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367687575] [2022-12-14 04:49:51,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:49:51,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766959573] [2022-12-14 04:49:51,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766959573] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:49:51,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [427663531] [2022-12-14 04:49:51,133 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-12-14 04:49:51,133 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:49:51,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:49:51,133 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:49:51,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:49:53,944 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 04:49:53,947 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-12-14 04:49:53,957 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:50:27,231 WARN L233 SmtUtils]: Spent 28.23s on a formula simplification. DAG size of input: 178 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:50:43,157 WARN L233 SmtUtils]: Spent 11.69s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:50:55,644 WARN L233 SmtUtils]: Spent 11.62s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:51:13,987 WARN L233 SmtUtils]: Spent 16.39s on a formula simplification. DAG size of input: 176 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:51:14,360 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5668#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 04:51:14,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:51:14,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 04:51:14,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2022-12-14 04:51:14,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585887214] [2022-12-14 04:51:14,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 04:51:14,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 04:51:14,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:51:14,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 04:51:14,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 04:51:14,362 INFO L87 Difference]: Start difference. First operand 187 states and 266 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-12-14 04:51:19,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:51:19,873 INFO L93 Difference]: Finished difference Result 231 states and 326 transitions. [2022-12-14 04:51:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 04:51:19,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 79 [2022-12-14 04:51:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:51:19,875 INFO L225 Difference]: With dead ends: 231 [2022-12-14 04:51:19,875 INFO L226 Difference]: Without dead ends: 225 [2022-12-14 04:51:19,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 83.9s TimeCoverageRelationStatistics Valid=345, Invalid=2411, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 04:51:19,876 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 54 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:51:19,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 168 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 04:51:19,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-12-14 04:51:19,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 197. [2022-12-14 04:51:19,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 109 states have internal predecessors, (127), 71 states have call successors, (71), 17 states have call predecessors, (71), 17 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-12-14 04:51:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 268 transitions. [2022-12-14 04:51:19,948 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 268 transitions. Word has length 79 [2022-12-14 04:51:19,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:51:19,948 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 268 transitions. [2022-12-14 04:51:19,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-12-14 04:51:19,948 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 268 transitions. [2022-12-14 04:51:19,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-14 04:51:19,949 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:51:19,949 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:51:19,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 04:51:20,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:51:20,151 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:51:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:51:20,152 INFO L85 PathProgramCache]: Analyzing trace with hash 145896886, now seen corresponding path program 1 times [2022-12-14 04:51:20,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:51:20,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982968849] [2022-12-14 04:51:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:51:20,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:51:20,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:51:20,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828088850] [2022-12-14 04:51:20,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:51:20,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:51:20,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:51:20,176 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:51:20,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 04:51:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:51:20,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-14 04:51:20,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:51:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 53 proven. 22 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-12-14 04:51:20,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:51:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 04:51:22,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:51:22,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982968849] [2022-12-14 04:51:22,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:51:22,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828088850] [2022-12-14 04:51:22,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828088850] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:51:22,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [234342896] [2022-12-14 04:51:22,329 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 04:51:22,329 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:51:22,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:51:22,330 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:51:22,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:51:23,516 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2022-12-14 04:51:23,541 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-12-14 04:51:23,549 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:51:52,631 WARN L233 SmtUtils]: Spent 21.03s on a formula simplification. DAG size of input: 178 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:52:11,401 WARN L233 SmtUtils]: Spent 9.53s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:52:19,900 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:52:20,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6951#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 04:52:20,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:52:20,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 04:52:20,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2022-12-14 04:52:20,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257874522] [2022-12-14 04:52:20,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 04:52:20,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 04:52:20,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:52:20,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 04:52:20,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1566, Unknown=3, NotChecked=0, Total=1806 [2022-12-14 04:52:20,109 INFO L87 Difference]: Start difference. First operand 197 states and 268 transitions. Second operand has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2022-12-14 04:52:23,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 04:52:36,104 WARN L233 SmtUtils]: Spent 11.21s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:52:43,516 WARN L233 SmtUtils]: Spent 7.03s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:52:45,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 04:52:52,261 WARN L233 SmtUtils]: Spent 5.33s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:52:56,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 04:53:03,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 04:53:06,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 04:53:08,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 04:53:11,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 04:53:23,922 WARN L233 SmtUtils]: Spent 10.70s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:53:27,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 04:53:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:28,550 INFO L93 Difference]: Finished difference Result 274 states and 382 transitions. [2022-12-14 04:53:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 04:53:28,551 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 90 [2022-12-14 04:53:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:28,554 INFO L225 Difference]: With dead ends: 274 [2022-12-14 04:53:28,554 INFO L226 Difference]: Without dead ends: 272 [2022-12-14 04:53:28,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 213 SyntacticMatches, 14 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 102.4s TimeCoverageRelationStatistics Valid=523, Invalid=3014, Unknown=3, NotChecked=0, Total=3540 [2022-12-14 04:53:28,556 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 102 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 173 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:28,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 132 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 914 Invalid, 5 Unknown, 0 Unchecked, 23.1s Time] [2022-12-14 04:53:28,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-12-14 04:53:28,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 254. [2022-12-14 04:53:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 139 states have (on average 1.1726618705035972) internal successors, (163), 142 states have internal predecessors, (163), 95 states have call successors, (95), 19 states have call predecessors, (95), 19 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-12-14 04:53:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 352 transitions. [2022-12-14 04:53:28,688 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 352 transitions. Word has length 90 [2022-12-14 04:53:28,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:28,688 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 352 transitions. [2022-12-14 04:53:28,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2022-12-14 04:53:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 352 transitions. [2022-12-14 04:53:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 04:53:28,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:28,689 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:28,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 04:53:28,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 04:53:28,891 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:28,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2106799636, now seen corresponding path program 2 times [2022-12-14 04:53:28,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:28,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266637098] [2022-12-14 04:53:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:28,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:28,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:53:28,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516939679] [2022-12-14 04:53:28,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:53:28,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:53:28,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:53:28,922 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:53:28,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 04:53:28,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 04:53:28,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:53:28,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 04:53:28,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:53:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-12-14 04:53:28,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:53:28,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:28,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266637098] [2022-12-14 04:53:28,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:53:28,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516939679] [2022-12-14 04:53:28,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516939679] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:28,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:28,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 04:53:28,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683087502] [2022-12-14 04:53:28,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:28,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:53:28,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:28,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:53:28,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:53:28,990 INFO L87 Difference]: Start difference. First operand 254 states and 352 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 04:53:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:29,176 INFO L93 Difference]: Finished difference Result 353 states and 485 transitions. [2022-12-14 04:53:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 04:53:29,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 99 [2022-12-14 04:53:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:29,179 INFO L225 Difference]: With dead ends: 353 [2022-12-14 04:53:29,179 INFO L226 Difference]: Without dead ends: 229 [2022-12-14 04:53:29,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:53:29,181 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:29,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 128 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:53:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-12-14 04:53:29,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 197. [2022-12-14 04:53:29,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 113 states have internal predecessors, (123), 67 states have call successors, (67), 19 states have call predecessors, (67), 19 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2022-12-14 04:53:29,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 256 transitions. [2022-12-14 04:53:29,279 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 256 transitions. Word has length 99 [2022-12-14 04:53:29,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:29,280 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 256 transitions. [2022-12-14 04:53:29,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 04:53:29,280 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 256 transitions. [2022-12-14 04:53:29,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 04:53:29,280 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:29,281 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:29,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 04:53:29,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:53:29,482 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:29,483 INFO L85 PathProgramCache]: Analyzing trace with hash -425141716, now seen corresponding path program 2 times [2022-12-14 04:53:29,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:29,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613556347] [2022-12-14 04:53:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:29,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:29,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:53:29,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99911074] [2022-12-14 04:53:29,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:53:29,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:53:29,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:53:29,512 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:53:29,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 04:53:29,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 04:53:29,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:53:29,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 04:53:29,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:53:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 33 proven. 32 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2022-12-14 04:53:29,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:53:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-12-14 04:53:30,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:30,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613556347] [2022-12-14 04:53:30,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:53:30,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99911074] [2022-12-14 04:53:30,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99911074] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:53:30,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1637142144] [2022-12-14 04:53:30,137 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 04:53:30,137 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:53:30,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:53:30,137 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:53:30,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:53:31,386 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2022-12-14 04:53:31,416 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-12-14 04:53:31,426 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:53:51,105 WARN L233 SmtUtils]: Spent 15.51s on a formula simplification. DAG size of input: 178 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:54:08,294 WARN L233 SmtUtils]: Spent 12.26s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:54:21,553 WARN L233 SmtUtils]: Spent 11.68s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:54:21,620 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9660#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 04:54:21,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:54:21,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 04:54:21,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-12-14 04:54:21,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7661450] [2022-12-14 04:54:21,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 04:54:21,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 04:54:21,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:21,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 04:54:21,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 04:54:21,623 INFO L87 Difference]: Start difference. First operand 197 states and 256 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-12-14 04:54:24,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:24,794 INFO L93 Difference]: Finished difference Result 228 states and 300 transitions. [2022-12-14 04:54:24,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 04:54:24,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 107 [2022-12-14 04:54:24,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:24,795 INFO L225 Difference]: With dead ends: 228 [2022-12-14 04:54:24,795 INFO L226 Difference]: Without dead ends: 226 [2022-12-14 04:54:24,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 268 SyntacticMatches, 16 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 51.6s TimeCoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 04:54:24,796 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 39 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:24,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 177 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 04:54:24,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-12-14 04:54:24,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 201. [2022-12-14 04:54:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 116 states have internal predecessors, (126), 67 states have call successors, (67), 20 states have call predecessors, (67), 20 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2022-12-14 04:54:24,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 259 transitions. [2022-12-14 04:54:24,909 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 259 transitions. Word has length 107 [2022-12-14 04:54:24,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:24,910 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 259 transitions. [2022-12-14 04:54:24,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-12-14 04:54:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 259 transitions. [2022-12-14 04:54:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 04:54:24,911 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:24,911 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:54:24,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 04:54:25,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 04:54:25,111 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:54:25,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1538893617, now seen corresponding path program 3 times [2022-12-14 04:54:25,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:54:25,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301007504] [2022-12-14 04:54:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:25,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:54:25,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:54:25,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651794920] [2022-12-14 04:54:25,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 04:54:25,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:25,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:25,120 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:54:25,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 04:54:25,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 04:54:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:54:25,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 04:54:25,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 39 proven. 89 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2022-12-14 04:54:25,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 37 proven. 83 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-12-14 04:54:29,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:54:29,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301007504] [2022-12-14 04:54:29,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:54:29,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651794920] [2022-12-14 04:54:29,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651794920] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:29,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [827012614] [2022-12-14 04:54:29,102 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-12-14 04:54:29,102 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:54:29,102 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:54:29,103 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:54:29,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:54:30,664 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2022-12-14 04:54:30,691 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-12-14 04:54:30,699 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:54:57,175 WARN L233 SmtUtils]: Spent 20.71s on a formula simplification. DAG size of input: 178 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:55:15,242 WARN L233 SmtUtils]: Spent 10.52s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:55:32,416 WARN L233 SmtUtils]: Spent 15.74s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:55:45,863 WARN L233 SmtUtils]: Spent 11.45s on a formula simplification. DAG size of input: 176 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:55:45,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11114#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 04:55:45,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:55:45,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 04:55:45,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2022-12-14 04:55:45,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374782294] [2022-12-14 04:55:45,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 04:55:45,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 04:55:45,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:45,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 04:55:45,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=2325, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 04:55:45,913 INFO L87 Difference]: Start difference. First operand 201 states and 259 transitions. Second operand has 31 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 28 states have internal predecessors, (51), 16 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 14 states have call predecessors, (43), 14 states have call successors, (43) [2022-12-14 04:56:20,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:56:20,983 INFO L93 Difference]: Finished difference Result 344 states and 476 transitions. [2022-12-14 04:56:20,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 04:56:20,983 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 28 states have internal predecessors, (51), 16 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 14 states have call predecessors, (43), 14 states have call successors, (43) Word has length 121 [2022-12-14 04:56:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:56:20,984 INFO L225 Difference]: With dead ends: 344 [2022-12-14 04:56:20,984 INFO L226 Difference]: Without dead ends: 336 [2022-12-14 04:56:20,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 291 SyntacticMatches, 20 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3557 ImplicationChecksByTransitivity, 97.7s TimeCoverageRelationStatistics Valid=1145, Invalid=7226, Unknown=1, NotChecked=0, Total=8372 [2022-12-14 04:56:20,986 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 218 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 2133 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 2665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 2133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:56:20,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 292 Invalid, 2665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 2133 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2022-12-14 04:56:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-12-14 04:56:21,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 294. [2022-12-14 04:56:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 159 states have (on average 1.1320754716981132) internal successors, (180), 162 states have internal predecessors, (180), 111 states have call successors, (111), 23 states have call predecessors, (111), 23 states have return successors, (110), 108 states have call predecessors, (110), 110 states have call successors, (110) [2022-12-14 04:56:21,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 401 transitions. [2022-12-14 04:56:21,257 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 401 transitions. Word has length 121 [2022-12-14 04:56:21,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:56:21,258 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 401 transitions. [2022-12-14 04:56:21,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 28 states have internal predecessors, (51), 16 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 14 states have call predecessors, (43), 14 states have call successors, (43) [2022-12-14 04:56:21,258 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 401 transitions. [2022-12-14 04:56:21,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 04:56:21,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:56:21,260 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:56:21,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 04:56:21,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 04:56:21,462 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:56:21,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:56:21,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1914774331, now seen corresponding path program 3 times [2022-12-14 04:56:21,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:56:21,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949260186] [2022-12-14 04:56:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:56:21,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:56:21,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 04:56:21,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117295514] [2022-12-14 04:56:21,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 04:56:21,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:56:21,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:56:21,495 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:56:21,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 04:56:21,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 04:56:21,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:56:21,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-14 04:56:21,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:56:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 140 proven. 71 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2022-12-14 04:56:23,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:56:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 138 proven. 65 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-12-14 04:56:48,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:56:48,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949260186] [2022-12-14 04:56:48,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:56:48,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117295514] [2022-12-14 04:56:48,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117295514] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:56:48,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1919433352] [2022-12-14 04:56:48,981 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 04:56:48,981 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:56:48,982 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:56:48,982 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:56:48,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:56:51,991 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 04:56:51,993 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-12-14 04:56:52,003 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:57:48,846 WARN L233 SmtUtils]: Spent 9.49s on a formula simplification. DAG size of input: 85 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:57:58,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13077#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 04:57:58,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:57:58,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 04:57:58,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2022-12-14 04:57:58,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282522424] [2022-12-14 04:57:58,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 04:57:58,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 04:57:58,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:57:58,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 04:57:58,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2282, Unknown=11, NotChecked=0, Total=2652 [2022-12-14 04:57:58,067 INFO L87 Difference]: Start difference. First operand 294 states and 401 transitions. Second operand has 33 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 18 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 18 states have call predecessors, (49), 17 states have call successors, (49) [2022-12-14 04:58:01,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 04:58:31,801 WARN L233 SmtUtils]: Spent 26.44s on a formula simplification. DAG size of input: 146 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:58:33,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 04:58:51,184 WARN L233 SmtUtils]: Spent 17.39s on a formula simplification that was a NOOP. DAG size: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:58:54,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 04:58:56,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 04:59:07,600 WARN L233 SmtUtils]: Spent 11.44s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:59:22,437 WARN L233 SmtUtils]: Spent 14.52s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:59:24,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 04:59:26,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 04:59:53,052 WARN L233 SmtUtils]: Spent 21.20s on a formula simplification. DAG size of input: 145 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:00:28,152 WARN L233 SmtUtils]: Spent 34.27s on a formula simplification that was a NOOP. DAG size: 126 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:00:30,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:00:33,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:00:42,831 WARN L233 SmtUtils]: Spent 7.21s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:00:44,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:00:52,364 WARN L233 SmtUtils]: Spent 7.03s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:00:54,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:00:56,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:00:59,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:01:01,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:01:03,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:01:05,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:01:19,811 WARN L233 SmtUtils]: Spent 14.27s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:01:22,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:01:24,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:01:28,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:01:31,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:01:33,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:01:35,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:01:40,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:01:42,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:01:44,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:02:02,477 WARN L233 SmtUtils]: Spent 17.60s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:02:05,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:02:33,911 WARN L233 SmtUtils]: Spent 21.29s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:02:34,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:02:34,404 INFO L93 Difference]: Finished difference Result 356 states and 489 transitions. [2022-12-14 05:02:34,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 05:02:34,404 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 18 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 18 states have call predecessors, (49), 17 states have call successors, (49) Word has length 137 [2022-12-14 05:02:34,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:02:34,405 INFO L225 Difference]: With dead ends: 356 [2022-12-14 05:02:34,405 INFO L226 Difference]: Without dead ends: 354 [2022-12-14 05:02:34,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 334 SyntacticMatches, 27 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3492 ImplicationChecksByTransitivity, 283.8s TimeCoverageRelationStatistics Valid=1033, Invalid=4961, Unknown=12, NotChecked=0, Total=6006 [2022-12-14 05:02:34,407 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 91 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 145 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:02:34,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 208 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1500 Invalid, 23 Unknown, 0 Unchecked, 65.7s Time] [2022-12-14 05:02:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-12-14 05:02:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 351. [2022-12-14 05:02:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 189 states have (on average 1.1375661375661377) internal successors, (215), 192 states have internal predecessors, (215), 135 states have call successors, (135), 26 states have call predecessors, (135), 26 states have return successors, (134), 132 states have call predecessors, (134), 134 states have call successors, (134) [2022-12-14 05:02:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 484 transitions. [2022-12-14 05:02:34,818 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 484 transitions. Word has length 137 [2022-12-14 05:02:34,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:02:34,819 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 484 transitions. [2022-12-14 05:02:34,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 18 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 18 states have call predecessors, (49), 17 states have call successors, (49) [2022-12-14 05:02:34,819 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 484 transitions. [2022-12-14 05:02:34,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-12-14 05:02:34,820 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:02:34,820 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:02:34,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 05:02:35,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 05:02:35,022 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:02:35,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:02:35,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1626488809, now seen corresponding path program 4 times [2022-12-14 05:02:35,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:02:35,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198045696] [2022-12-14 05:02:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:02:35,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:02:35,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:02:35,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837376226] [2022-12-14 05:02:35,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:02:35,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:02:35,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:02:35,041 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:02:35,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caee7b69-0e6d-413d-a2ef-c20fab393fec/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 05:02:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:02:35,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 124 conjunts are in the unsatisfiable core [2022-12-14 05:02:35,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:02:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 162 proven. 298 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2022-12-14 05:02:37,332 INFO L328 TraceCheckSpWp]: Computing backward predicates...