./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7 --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 64bit --witnessprinter.graph.data.programhash eca061443980e8d0803d9e641f2f399e16662610ff9edce1dac481c57666d01d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:08:37,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:08:37,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:08:37,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:08:37,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:08:37,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:08:37,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:08:37,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:08:37,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:08:37,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:08:37,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:08:37,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:08:37,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:08:37,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:08:37,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:08:37,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:08:37,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:08:37,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:08:37,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:08:37,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:08:37,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:08:37,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:08:37,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:08:37,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:08:37,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:08:37,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:08:37,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:08:37,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:08:37,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:08:37,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:08:37,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:08:37,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:08:37,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:08:37,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:08:37,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:08:37,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:08:37,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:08:37,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:08:37,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:08:37,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:08:37,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:08:37,121 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 19:08:37,180 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:08:37,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:08:37,182 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:08:37,182 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:08:37,183 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:08:37,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:08:37,184 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:08:37,184 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:08:37,184 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:08:37,185 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:08:37,186 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:08:37,186 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:08:37,187 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:08:37,187 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:08:37,187 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:08:37,187 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:08:37,188 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:08:37,188 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:08:37,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:08:37,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:08:37,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:08:37,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:08:37,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:08:37,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:08:37,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:08:37,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:08:37,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:08:37,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:08:37,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:08:37,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:08:37,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:08:37,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:08:37,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:08:37,193 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:08:37,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:08:37,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:08:37,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:08:37,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:08:37,194 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eca061443980e8d0803d9e641f2f399e16662610ff9edce1dac481c57666d01d [2021-11-25 19:08:37,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:08:37,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:08:37,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:08:37,521 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:08:37,522 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:08:37,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i [2021-11-25 19:08:37,600 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/data/ec8a2d35f/ed03abadd71147d5ac2975493aa4aae4/FLAG6e56bbef5 [2021-11-25 19:08:38,570 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:08:38,570 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i [2021-11-25 19:08:38,622 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/data/ec8a2d35f/ed03abadd71147d5ac2975493aa4aae4/FLAG6e56bbef5 [2021-11-25 19:08:38,935 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/data/ec8a2d35f/ed03abadd71147d5ac2975493aa4aae4 [2021-11-25 19:08:38,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:08:38,940 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:08:38,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:08:38,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:08:38,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:08:38,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:08:38" (1/1) ... [2021-11-25 19:08:38,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38111636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:38, skipping insertion in model container [2021-11-25 19:08:38,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:08:38" (1/1) ... [2021-11-25 19:08:38,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:08:39,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:08:42,179 WARN L230 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_ef783402-6514-4c5b-a575-9501587ea16b/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i[342799,342812] [2021-11-25 19:08:42,242 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-25 19:08:42,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:08:42,288 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:08:42,902 WARN L230 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_ef783402-6514-4c5b-a575-9501587ea16b/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i[342799,342812] [2021-11-25 19:08:42,907 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-25 19:08:42,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:08:43,042 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:08:43,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:43 WrapperNode [2021-11-25 19:08:43,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:08:43,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:08:43,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:08:43,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:08:43,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:43" (1/1) ... [2021-11-25 19:08:43,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:43" (1/1) ... [2021-11-25 19:08:43,531 INFO L137 Inliner]: procedures = 266, calls = 4385, calls flagged for inlining = 129, calls inlined = 122, statements flattened = 9430 [2021-11-25 19:08:43,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:08:43,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:08:43,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:08:43,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:08:43,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:43" (1/1) ... [2021-11-25 19:08:43,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:43" (1/1) ... [2021-11-25 19:08:43,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:43" (1/1) ... [2021-11-25 19:08:43,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:43" (1/1) ... [2021-11-25 19:08:43,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:43" (1/1) ... [2021-11-25 19:08:43,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:43" (1/1) ... [2021-11-25 19:08:43,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:43" (1/1) ... [2021-11-25 19:08:44,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:08:44,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:08:44,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:08:44,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:08:44,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:43" (1/1) ... [2021-11-25 19:08:44,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:08:44,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:08:44,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:08:44,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:08:44,101 INFO L130 BoogieDeclarations]: Found specification of procedure __scsi_print_sense [2021-11-25 19:08:44,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __scsi_print_sense [2021-11-25 19:08:44,102 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-25 19:08:44,102 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-25 19:08:44,102 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-25 19:08:44,102 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_del [2021-11-25 19:08:44,102 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_del [2021-11-25 19:08:44,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 19:08:44,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 19:08:44,103 INFO L130 BoogieDeclarations]: Found specification of procedure driver_remove_file [2021-11-25 19:08:44,103 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_remove_file [2021-11-25 19:08:44,103 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 19:08:44,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 19:08:44,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 19:08:44,103 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 19:08:44,153 INFO L130 BoogieDeclarations]: Found specification of procedure find_partition [2021-11-25 19:08:44,153 INFO L138 BoogieDeclarations]: Found implementation of procedure find_partition [2021-11-25 19:08:44,153 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-25 19:08:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-25 19:08:44,154 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2021-11-25 19:08:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2021-11-25 19:08:44,154 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-25 19:08:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-25 19:08:44,154 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-25 19:08:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-25 19:08:44,154 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 19:08:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 19:08:44,154 INFO L130 BoogieDeclarations]: Found specification of procedure class_unregister [2021-11-25 19:08:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure class_unregister [2021-11-25 19:08:44,155 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible_nested [2021-11-25 19:08:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible_nested [2021-11-25 19:08:44,155 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 19:08:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 19:08:44,155 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 19:08:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 19:08:44,155 INFO L130 BoogieDeclarations]: Found specification of procedure tape_name [2021-11-25 19:08:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure tape_name [2021-11-25 19:08:44,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 19:08:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 19:08:44,156 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:08:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:08:44,156 INFO L130 BoogieDeclarations]: Found specification of procedure st_int_ioctl [2021-11-25 19:08:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure st_int_ioctl [2021-11-25 19:08:44,156 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_rq_timeout [2021-11-25 19:08:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_rq_timeout [2021-11-25 19:08:44,156 INFO L130 BoogieDeclarations]: Found specification of procedure set_mode_densblk [2021-11-25 19:08:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure set_mode_densblk [2021-11-25 19:08:44,156 INFO L130 BoogieDeclarations]: Found specification of procedure ktime_get [2021-11-25 19:08:44,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ktime_get [2021-11-25 19:08:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:08:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure atomic64_read [2021-11-25 19:08:44,157 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic64_read [2021-11-25 19:08:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure read_mode_page [2021-11-25 19:08:44,157 INFO L138 BoogieDeclarations]: Found implementation of procedure read_mode_page [2021-11-25 19:08:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure do_door_lock [2021-11-25 19:08:44,157 INFO L138 BoogieDeclarations]: Found implementation of procedure do_door_lock [2021-11-25 19:08:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:08:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2021-11-25 19:08:44,158 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2021-11-25 19:08:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 19:08:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure st_do_scsi [2021-11-25 19:08:44,158 INFO L138 BoogieDeclarations]: Found implementation of procedure st_do_scsi [2021-11-25 19:08:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-25 19:08:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 19:08:44,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 19:08:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-25 19:08:44,158 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-25 19:08:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure atomic64_inc [2021-11-25 19:08:44,159 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic64_inc [2021-11-25 19:08:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2021-11-25 19:08:44,159 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2021-11-25 19:08:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:08:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure st_release_request [2021-11-25 19:08:44,159 INFO L138 BoogieDeclarations]: Found implementation of procedure st_release_request [2021-11-25 19:08:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:08:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure remove_cdevs [2021-11-25 19:08:44,159 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_cdevs [2021-11-25 19:08:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-25 19:08:44,160 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-25 19:08:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure get_location [2021-11-25 19:08:44,160 INFO L138 BoogieDeclarations]: Found implementation of procedure get_location [2021-11-25 19:08:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure st_compression [2021-11-25 19:08:44,160 INFO L138 BoogieDeclarations]: Found implementation of procedure st_compression [2021-11-25 19:08:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_put_device [2021-11-25 19:08:44,160 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_put_device [2021-11-25 19:08:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-25 19:08:44,160 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-25 19:08:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-11-25 19:08:44,160 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-11-25 19:08:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-25 19:08:44,160 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-25 19:08:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-25 19:08:44,161 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-25 19:08:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-25 19:08:44,161 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-25 19:08:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure check_tape [2021-11-25 19:08:44,161 INFO L138 BoogieDeclarations]: Found implementation of procedure check_tape [2021-11-25 19:08:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-25 19:08:44,161 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-25 19:08:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure switch_partition [2021-11-25 19:08:44,161 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_partition [2021-11-25 19:08:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 19:08:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure setup_buffering [2021-11-25 19:08:44,161 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_buffering [2021-11-25 19:08:44,161 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-25 19:08:44,161 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-25 19:08:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_tape_put [2021-11-25 19:08:44,162 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_tape_put [2021-11-25 19:08:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 19:08:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_cmd_ioctl [2021-11-25 19:08:44,162 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_cmd_ioctl [2021-11-25 19:08:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure st_log_options [2021-11-25 19:08:44,162 INFO L138 BoogieDeclarations]: Found implementation of procedure st_log_options [2021-11-25 19:08:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:08:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure create_one_cdev [2021-11-25 19:08:44,162 INFO L138 BoogieDeclarations]: Found implementation of procedure create_one_cdev [2021-11-25 19:08:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure queue_dma_alignment [2021-11-25 19:08:44,162 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_dma_alignment [2021-11-25 19:08:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure do_load_unload [2021-11-25 19:08:44,162 INFO L138 BoogieDeclarations]: Found implementation of procedure do_load_unload [2021-11-25 19:08:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush_write_buffer [2021-11-25 19:08:44,163 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush_write_buffer [2021-11-25 19:08:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 19:08:44,163 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 19:08:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure enlarge_buffer [2021-11-25 19:08:44,163 INFO L138 BoogieDeclarations]: Found implementation of procedure enlarge_buffer [2021-11-25 19:08:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure cross_eof [2021-11-25 19:08:44,163 INFO L138 BoogieDeclarations]: Found implementation of procedure cross_eof [2021-11-25 19:08:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure st_chk_result [2021-11-25 19:08:44,163 INFO L138 BoogieDeclarations]: Found implementation of procedure st_chk_result [2021-11-25 19:08:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 19:08:44,163 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 19:08:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure write_behind_check [2021-11-25 19:08:44,163 INFO L138 BoogieDeclarations]: Found implementation of procedure write_behind_check [2021-11-25 19:08:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:08:44,166 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-25 19:08:44,166 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-25 19:08:44,166 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-25 19:08:44,166 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-25 19:08:44,167 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 19:08:44,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 19:08:44,167 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2021-11-25 19:08:44,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2021-11-25 19:08:44,167 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-25 19:08:44,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-25 19:08:44,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:08:44,168 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-25 19:08:44,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-25 19:08:44,168 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-25 19:08:44,168 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-25 19:08:44,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:08:44,168 INFO L130 BoogieDeclarations]: Found specification of procedure deb_space_print [2021-11-25 19:08:44,169 INFO L138 BoogieDeclarations]: Found implementation of procedure deb_space_print [2021-11-25 19:08:44,169 INFO L130 BoogieDeclarations]: Found specification of procedure flush_buffer [2021-11-25 19:08:44,169 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_buffer [2021-11-25 19:08:44,169 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2021-11-25 19:08:44,169 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2021-11-25 19:08:44,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:08:44,170 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 19:08:44,170 INFO L130 BoogieDeclarations]: Found specification of procedure driver_create_file [2021-11-25 19:08:44,170 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_create_file [2021-11-25 19:08:44,170 INFO L130 BoogieDeclarations]: Found specification of procedure release_buffering [2021-11-25 19:08:44,170 INFO L138 BoogieDeclarations]: Found implementation of procedure release_buffering [2021-11-25 19:08:44,171 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2021-11-25 19:08:44,171 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2021-11-25 19:08:44,171 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_buffer [2021-11-25 19:08:44,171 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_buffer [2021-11-25 19:08:44,171 INFO L130 BoogieDeclarations]: Found specification of procedure write_mode_page [2021-11-25 19:08:44,171 INFO L138 BoogieDeclarations]: Found implementation of procedure write_mode_page [2021-11-25 19:08:44,172 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush [2021-11-25 19:08:44,172 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush [2021-11-25 19:08:44,172 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 19:08:44,172 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 19:08:44,172 INFO L130 BoogieDeclarations]: Found specification of procedure rw_checks [2021-11-25 19:08:44,172 INFO L138 BoogieDeclarations]: Found implementation of procedure rw_checks [2021-11-25 19:08:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2021-11-25 19:08:44,173 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2021-11-25 19:08:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2021-11-25 19:08:44,173 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2021-11-25 19:08:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure st_write [2021-11-25 19:08:44,174 INFO L138 BoogieDeclarations]: Found implementation of procedure st_write [2021-11-25 19:08:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-25 19:08:44,174 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-25 19:08:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:08:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_get_device [2021-11-25 19:08:44,174 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_get_device [2021-11-25 19:08:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure set_location [2021-11-25 19:08:44,175 INFO L138 BoogieDeclarations]: Found implementation of procedure set_location [2021-11-25 19:08:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:08:44,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:08:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-25 19:08:44,175 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-25 19:08:45,254 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:08:45,258 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:08:45,378 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 19:08:57,566 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:09:03,922 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:09:03,923 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:09:03,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:09:03 BoogieIcfgContainer [2021-11-25 19:09:03,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:09:03,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:09:03,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:09:03,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:09:03,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:08:38" (1/3) ... [2021-11-25 19:09:03,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1242a8e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:09:03, skipping insertion in model container [2021-11-25 19:09:03,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:43" (2/3) ... [2021-11-25 19:09:03,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1242a8e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:09:03, skipping insertion in model container [2021-11-25 19:09:03,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:09:03" (3/3) ... [2021-11-25 19:09:03,945 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i [2021-11-25 19:09:03,953 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:09:03,953 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:09:04,029 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:09:04,037 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:09:04,037 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:09:04,126 INFO L276 IsEmpty]: Start isEmpty. Operand has 1984 states, 1359 states have (on average 1.445916114790287) internal successors, (1965), 1399 states have internal predecessors, (1965), 538 states have call successors, (538), 86 states have call predecessors, (538), 85 states have return successors, (515), 514 states have call predecessors, (515), 515 states have call successors, (515) [2021-11-25 19:09:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2021-11-25 19:09:04,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:04,174 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1] [2021-11-25 19:09:04,175 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:04,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1692167717, now seen corresponding path program 1 times [2021-11-25 19:09:04,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:04,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453486508] [2021-11-25 19:09:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:04,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16726 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16726 trivial. 0 not checked. [2021-11-25 19:09:07,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:07,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453486508] [2021-11-25 19:09:07,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453486508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:07,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:07,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:09:07,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028331659] [2021-11-25 19:09:07,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:07,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:09:07,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:07,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:09:07,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:09:07,335 INFO L87 Difference]: Start difference. First operand has 1984 states, 1359 states have (on average 1.445916114790287) internal successors, (1965), 1399 states have internal predecessors, (1965), 538 states have call successors, (538), 86 states have call predecessors, (538), 85 states have return successors, (515), 514 states have call predecessors, (515), 515 states have call successors, (515) Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-25 19:09:09,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:11,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:14,600 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:09:18,026 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:20,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:21,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:24,039 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:26,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:28,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:09:31,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:09:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:32,462 INFO L93 Difference]: Finished difference Result 3775 states and 5748 transitions. [2021-11-25 19:09:32,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:09:32,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 790 [2021-11-25 19:09:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:32,530 INFO L225 Difference]: With dead ends: 3775 [2021-11-25 19:09:32,531 INFO L226 Difference]: Without dead ends: 3708 [2021-11-25 19:09:32,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:09:32,546 INFO L933 BasicCegarLoop]: 3125 mSDtfsCounter, 2774 mSDsluCounter, 2807 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2774 SdHoareTripleChecker+Valid, 5600 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:32,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2774 Valid, 5600 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 673 Invalid, 4 Unknown, 0 Unchecked, 24.8s Time] [2021-11-25 19:09:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2021-11-25 19:09:32,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 3708. [2021-11-25 19:09:32,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 2606 states have (on average 1.440905602455871) internal successors, (3755), 2634 states have internal predecessors, (3755), 935 states have call successors, (935), 167 states have call predecessors, (935), 166 states have return successors, (934), 933 states have call predecessors, (934), 934 states have call successors, (934) [2021-11-25 19:09:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 5624 transitions. [2021-11-25 19:09:32,906 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 5624 transitions. Word has length 790 [2021-11-25 19:09:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:32,911 INFO L470 AbstractCegarLoop]: Abstraction has 3708 states and 5624 transitions. [2021-11-25 19:09:32,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-25 19:09:32,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 5624 transitions. [2021-11-25 19:09:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2021-11-25 19:09:33,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:33,014 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:33,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:09:33,015 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:33,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:33,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1640837243, now seen corresponding path program 1 times [2021-11-25 19:09:33,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:33,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568975220] [2021-11-25 19:09:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:33,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:33,552 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:09:33,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123467630] [2021-11-25 19:09:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:33,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:09:33,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:09:33,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:09:33,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:09:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:36,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 9664 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:09:36,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:09:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16735 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16726 trivial. 0 not checked. [2021-11-25 19:09:38,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:09:38,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:38,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568975220] [2021-11-25 19:09:38,085 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:09:38,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123467630] [2021-11-25 19:09:38,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123467630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:38,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:38,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:09:38,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128437487] [2021-11-25 19:09:38,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:38,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:09:38,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:38,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:09:38,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:09:38,095 INFO L87 Difference]: Start difference. First operand 3708 states and 5624 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (76), 2 states have call predecessors, (76), 2 states have return successors, (75), 2 states have call predecessors, (75), 2 states have call successors, (75) [2021-11-25 19:09:40,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:42,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:45,632 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:49,283 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:09:51,587 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:53,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:56,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:59,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:10:00,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:00,720 INFO L93 Difference]: Finished difference Result 8045 states and 12163 transitions. [2021-11-25 19:10:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:10:00,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (76), 2 states have call predecessors, (76), 2 states have return successors, (75), 2 states have call predecessors, (75), 2 states have call successors, (75) Word has length 851 [2021-11-25 19:10:00,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:00,765 INFO L225 Difference]: With dead ends: 8045 [2021-11-25 19:10:00,765 INFO L226 Difference]: Without dead ends: 4474 [2021-11-25 19:10:00,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 849 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:10:00,790 INFO L933 BasicCegarLoop]: 2712 mSDtfsCounter, 533 mSDsluCounter, 2931 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 10 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 5315 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:00,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 5315 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 699 Invalid, 7 Unknown, 0 Unchecked, 22.4s Time] [2021-11-25 19:10:00,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4474 states. [2021-11-25 19:10:00,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4474 to 4468. [2021-11-25 19:10:01,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4468 states, 3159 states have (on average 1.4415954415954415) internal successors, (4554), 3202 states have internal predecessors, (4554), 1084 states have call successors, (1084), 225 states have call predecessors, (1084), 224 states have return successors, (1083), 1081 states have call predecessors, (1083), 1083 states have call successors, (1083) [2021-11-25 19:10:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4468 states to 4468 states and 6721 transitions. [2021-11-25 19:10:01,042 INFO L78 Accepts]: Start accepts. Automaton has 4468 states and 6721 transitions. Word has length 851 [2021-11-25 19:10:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:01,045 INFO L470 AbstractCegarLoop]: Abstraction has 4468 states and 6721 transitions. [2021-11-25 19:10:01,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (76), 2 states have call predecessors, (76), 2 states have return successors, (75), 2 states have call predecessors, (75), 2 states have call successors, (75) [2021-11-25 19:10:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 4468 states and 6721 transitions. [2021-11-25 19:10:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2021-11-25 19:10:01,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:01,064 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:01,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:10:01,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:01,292 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:01,293 INFO L85 PathProgramCache]: Analyzing trace with hash -278240586, now seen corresponding path program 1 times [2021-11-25 19:10:01,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:01,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799739640] [2021-11-25 19:10:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:01,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16751 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 16748 trivial. 0 not checked. [2021-11-25 19:10:02,555 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:02,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799739640] [2021-11-25 19:10:02,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799739640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:02,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:02,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:10:02,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538325874] [2021-11-25 19:10:02,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:02,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:10:02,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:02,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:10:02,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:10:02,560 INFO L87 Difference]: Start difference. First operand 4468 states and 6721 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) [2021-11-25 19:10:04,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:07,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:12,191 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:10:14,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:15,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:17,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:19,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:21,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:22,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:24,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:26,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:31,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:10:32,737 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:10:34,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:10:36,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:36,377 INFO L93 Difference]: Finished difference Result 12539 states and 18994 transitions. [2021-11-25 19:10:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:10:36,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) Word has length 879 [2021-11-25 19:10:36,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:36,460 INFO L225 Difference]: With dead ends: 12539 [2021-11-25 19:10:36,460 INFO L226 Difference]: Without dead ends: 8208 [2021-11-25 19:10:36,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:10:36,493 INFO L933 BasicCegarLoop]: 4432 mSDtfsCounter, 2481 mSDsluCounter, 2952 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 1 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2509 SdHoareTripleChecker+Valid, 7054 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:36,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2509 Valid, 7054 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 912 Invalid, 7 Unknown, 0 Unchecked, 33.4s Time] [2021-11-25 19:10:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8208 states. [2021-11-25 19:10:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8208 to 8192. [2021-11-25 19:10:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8192 states, 5877 states have (on average 1.454823889739663) internal successors, (8550), 5956 states have internal predecessors, (8550), 1926 states have call successors, (1926), 389 states have call predecessors, (1926), 388 states have return successors, (1981), 1915 states have call predecessors, (1981), 1925 states have call successors, (1981) [2021-11-25 19:10:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8192 states to 8192 states and 12457 transitions. [2021-11-25 19:10:37,203 INFO L78 Accepts]: Start accepts. Automaton has 8192 states and 12457 transitions. Word has length 879 [2021-11-25 19:10:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:37,205 INFO L470 AbstractCegarLoop]: Abstraction has 8192 states and 12457 transitions. [2021-11-25 19:10:37,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) [2021-11-25 19:10:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 8192 states and 12457 transitions. [2021-11-25 19:10:37,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 905 [2021-11-25 19:10:37,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:37,241 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2021-11-25 19:10:37,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:10:37,241 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:37,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:37,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1760802394, now seen corresponding path program 1 times [2021-11-25 19:10:37,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:37,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612065824] [2021-11-25 19:10:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:37,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:37,695 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:10:37,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916004526] [2021-11-25 19:10:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:37,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:37,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:10:37,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:10:37,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:10:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:40,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 10000 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:10:40,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:10:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18531 backedges. 1766 proven. 0 refuted. 0 times theorem prover too weak. 16765 trivial. 0 not checked. [2021-11-25 19:10:41,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:10:41,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:41,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612065824] [2021-11-25 19:10:41,891 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:10:41,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916004526] [2021-11-25 19:10:41,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916004526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:41,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:41,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:10:41,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492138531] [2021-11-25 19:10:41,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:41,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:10:41,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:41,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:10:41,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:10:41,894 INFO L87 Difference]: Start difference. First operand 8192 states and 12457 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 3 states have call successors, (81), 3 states have call predecessors, (81), 2 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) [2021-11-25 19:10:43,966 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:47,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:10:49,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:52,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:54,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:57,416 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:11:03,071 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:11:05,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:05,005 INFO L93 Difference]: Finished difference Result 23869 states and 36351 transitions. [2021-11-25 19:11:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:11:05,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 3 states have call successors, (81), 3 states have call predecessors, (81), 2 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) Word has length 904 [2021-11-25 19:11:05,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:05,159 INFO L225 Difference]: With dead ends: 23869 [2021-11-25 19:11:05,159 INFO L226 Difference]: Without dead ends: 15617 [2021-11-25 19:11:05,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 902 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:11:05,207 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 2518 mSDsluCounter, 2927 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2532 SdHoareTripleChecker+Valid, 5892 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:05,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2532 Valid, 5892 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 703 Invalid, 7 Unknown, 0 Unchecked, 22.7s Time] [2021-11-25 19:11:05,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15617 states. [2021-11-25 19:11:05,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15617 to 15563. [2021-11-25 19:11:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15563 states, 11251 states have (on average 1.4580926139898676) internal successors, (16405), 11369 states have internal predecessors, (16405), 3583 states have call successors, (3583), 729 states have call predecessors, (3583), 728 states have return successors, (3722), 3567 states have call predecessors, (3722), 3582 states have call successors, (3722) [2021-11-25 19:11:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15563 states to 15563 states and 23710 transitions. [2021-11-25 19:11:06,077 INFO L78 Accepts]: Start accepts. Automaton has 15563 states and 23710 transitions. Word has length 904 [2021-11-25 19:11:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:06,079 INFO L470 AbstractCegarLoop]: Abstraction has 15563 states and 23710 transitions. [2021-11-25 19:11:06,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 3 states have call successors, (81), 3 states have call predecessors, (81), 2 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) [2021-11-25 19:11:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 15563 states and 23710 transitions. [2021-11-25 19:11:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2021-11-25 19:11:06,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:06,118 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:06,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:06,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:06,333 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:11:06,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:06,333 INFO L85 PathProgramCache]: Analyzing trace with hash 172327203, now seen corresponding path program 1 times [2021-11-25 19:11:06,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:11:06,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066375722] [2021-11-25 19:11:06,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:06,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:11:06,752 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:11:06,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906769657] [2021-11-25 19:11:06,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:06,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:06,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:11:06,754 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:11:06,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:11:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:09,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 10062 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:11:09,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18537 backedges. 1769 proven. 0 refuted. 0 times theorem prover too weak. 16768 trivial. 0 not checked. [2021-11-25 19:11:11,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:11,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:11:11,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066375722] [2021-11-25 19:11:11,138 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:11:11,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906769657] [2021-11-25 19:11:11,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906769657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:11,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:11,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:11:11,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536938519] [2021-11-25 19:11:11,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:11,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:11:11,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:11:11,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:11:11,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:11:11,142 INFO L87 Difference]: Start difference. First operand 15563 states and 23710 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 3 states have call successors, (88), 3 states have call predecessors, (88), 3 states have return successors, (87), 3 states have call predecessors, (87), 3 states have call successors, (87) [2021-11-25 19:11:13,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:11:19,039 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:11:22,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:11:23,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:11:25,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:11:28,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:11:30,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:11:34,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:11:35,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:35,840 INFO L93 Difference]: Finished difference Result 40053 states and 60840 transitions. [2021-11-25 19:11:35,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:11:35,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 3 states have call successors, (88), 3 states have call predecessors, (88), 3 states have return successors, (87), 3 states have call predecessors, (87), 3 states have call successors, (87) Word has length 922 [2021-11-25 19:11:35,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:36,017 INFO L225 Difference]: With dead ends: 40053 [2021-11-25 19:11:36,017 INFO L226 Difference]: Without dead ends: 24635 [2021-11-25 19:11:36,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 921 GetRequests, 920 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:11:36,097 INFO L933 BasicCegarLoop]: 2920 mSDtfsCounter, 1932 mSDsluCounter, 2775 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 14 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1934 SdHoareTripleChecker+Valid, 5378 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:36,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1934 Valid, 5378 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 688 Invalid, 7 Unknown, 0 Unchecked, 24.1s Time] [2021-11-25 19:11:36,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24635 states. [2021-11-25 19:11:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24635 to 24613. [2021-11-25 19:11:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24613 states, 17797 states have (on average 1.4557509692644828) internal successors, (25908), 17991 states have internal predecessors, (25908), 5559 states have call successors, (5559), 1257 states have call predecessors, (5559), 1256 states have return successors, (5810), 5531 states have call predecessors, (5810), 5558 states have call successors, (5810) [2021-11-25 19:11:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24613 states to 24613 states and 37277 transitions. [2021-11-25 19:11:37,569 INFO L78 Accepts]: Start accepts. Automaton has 24613 states and 37277 transitions. Word has length 922 [2021-11-25 19:11:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:37,571 INFO L470 AbstractCegarLoop]: Abstraction has 24613 states and 37277 transitions. [2021-11-25 19:11:37,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 3 states have call successors, (88), 3 states have call predecessors, (88), 3 states have return successors, (87), 3 states have call predecessors, (87), 3 states have call successors, (87) [2021-11-25 19:11:37,571 INFO L276 IsEmpty]: Start isEmpty. Operand 24613 states and 37277 transitions. [2021-11-25 19:11:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 933 [2021-11-25 19:11:37,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:37,609 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:37,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:37,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:37,836 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:11:37,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:37,837 INFO L85 PathProgramCache]: Analyzing trace with hash -17477289, now seen corresponding path program 1 times [2021-11-25 19:11:37,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:11:37,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190543808] [2021-11-25 19:11:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:37,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:11:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18541 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18521 trivial. 0 not checked. [2021-11-25 19:11:39,356 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:11:39,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190543808] [2021-11-25 19:11:39,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190543808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:39,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:39,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:11:39,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817551635] [2021-11-25 19:11:39,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:39,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:11:39,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:11:39,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:11:39,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:11:39,360 INFO L87 Difference]: Start difference. First operand 24613 states and 37277 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2021-11-25 19:11:41,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:11:44,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:11:47,729 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:11:49,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:11:52,992 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:11:56,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:11:58,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:12:01,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:12:02,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:02,579 INFO L93 Difference]: Finished difference Result 36987 states and 56034 transitions. [2021-11-25 19:12:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:12:02,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) Word has length 932 [2021-11-25 19:12:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:02,726 INFO L225 Difference]: With dead ends: 36987 [2021-11-25 19:12:02,726 INFO L226 Difference]: Without dead ends: 24615 [2021-11-25 19:12:02,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:12:02,777 INFO L933 BasicCegarLoop]: 2629 mSDtfsCounter, 0 mSDsluCounter, 2954 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5256 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:02,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 5256 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 663 Invalid, 7 Unknown, 0 Unchecked, 22.7s Time] [2021-11-25 19:12:02,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24615 states. [2021-11-25 19:12:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24615 to 24615. [2021-11-25 19:12:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24615 states, 17799 states have (on average 1.455699758413394) internal successors, (25910), 17993 states have internal predecessors, (25910), 5559 states have call successors, (5559), 1257 states have call predecessors, (5559), 1256 states have return successors, (5810), 5531 states have call predecessors, (5810), 5558 states have call successors, (5810) [2021-11-25 19:12:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24615 states to 24615 states and 37279 transitions. [2021-11-25 19:12:04,149 INFO L78 Accepts]: Start accepts. Automaton has 24615 states and 37279 transitions. Word has length 932 [2021-11-25 19:12:04,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:04,151 INFO L470 AbstractCegarLoop]: Abstraction has 24615 states and 37279 transitions. [2021-11-25 19:12:04,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2021-11-25 19:12:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 24615 states and 37279 transitions. [2021-11-25 19:12:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 935 [2021-11-25 19:12:04,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:04,186 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:04,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:12:04,186 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:12:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:04,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1383163354, now seen corresponding path program 1 times [2021-11-25 19:12:04,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:12:04,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262471849] [2021-11-25 19:12:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:04,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:12:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18543 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 18522 trivial. 0 not checked. [2021-11-25 19:12:05,359 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:12:05,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262471849] [2021-11-25 19:12:05,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262471849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:12:05,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856186825] [2021-11-25 19:12:05,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:05,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:05,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:05,361 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:05,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:12:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:08,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 10515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:12:08,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18543 backedges. 1760 proven. 0 refuted. 0 times theorem prover too weak. 16783 trivial. 0 not checked. [2021-11-25 19:12:09,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:12:09,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856186825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:12:09,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:12:09,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 19:12:09,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610987807] [2021-11-25 19:12:09,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:12:09,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:12:09,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:12:09,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:12:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:12:09,967 INFO L87 Difference]: Start difference. First operand 24615 states and 37279 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 3 states have call successors, (89), 3 states have call predecessors, (89), 2 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2021-11-25 19:12:12,734 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:12:16,762 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:12:19,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:12:21,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:12:24,587 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:12:27,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:12:28,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:12:30,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:12:33,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:12:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:34,891 INFO L93 Difference]: Finished difference Result 49094 states and 74417 transitions. [2021-11-25 19:12:34,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:12:34,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 3 states have call successors, (89), 3 states have call predecessors, (89), 2 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) Word has length 934 [2021-11-25 19:12:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:35,130 INFO L225 Difference]: With dead ends: 49094 [2021-11-25 19:12:35,131 INFO L226 Difference]: Without dead ends: 36720 [2021-11-25 19:12:35,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:12:35,198 INFO L933 BasicCegarLoop]: 3318 mSDtfsCounter, 2597 mSDsluCounter, 2929 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2597 SdHoareTripleChecker+Valid, 5917 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:35,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2597 Valid, 5917 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 711 Invalid, 3 Unknown, 0 Unchecked, 24.1s Time] [2021-11-25 19:12:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36720 states. [2021-11-25 19:12:36,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36720 to 35988. [2021-11-25 19:12:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35988 states, 26025 states have (on average 1.4559846301633046) internal successors, (37892), 26286 states have internal predecessors, (37892), 8140 states have call successors, (8140), 1821 states have call predecessors, (8140), 1822 states have return successors, (8517), 8104 states have call predecessors, (8517), 8139 states have call successors, (8517) [2021-11-25 19:12:37,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35988 states to 35988 states and 54549 transitions. [2021-11-25 19:12:37,313 INFO L78 Accepts]: Start accepts. Automaton has 35988 states and 54549 transitions. Word has length 934 [2021-11-25 19:12:37,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:37,314 INFO L470 AbstractCegarLoop]: Abstraction has 35988 states and 54549 transitions. [2021-11-25 19:12:37,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 3 states have call successors, (89), 3 states have call predecessors, (89), 2 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2021-11-25 19:12:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 35988 states and 54549 transitions. [2021-11-25 19:12:37,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 953 [2021-11-25 19:12:37,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:37,361 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1] [2021-11-25 19:12:37,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:37,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:12:37,581 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:12:37,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:37,581 INFO L85 PathProgramCache]: Analyzing trace with hash -4753321, now seen corresponding path program 1 times [2021-11-25 19:12:37,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:12:37,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748275443] [2021-11-25 19:12:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:37,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:12:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18549 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 18534 trivial. 0 not checked. [2021-11-25 19:12:38,962 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:12:38,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748275443] [2021-11-25 19:12:38,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748275443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:12:38,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474768390] [2021-11-25 19:12:38,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:38,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:38,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:38,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:38,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:12:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:42,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 10577 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:12:42,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18549 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18549 trivial. 0 not checked. [2021-11-25 19:12:45,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:12:45,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474768390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:12:45,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:12:45,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-25 19:12:45,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734688543] [2021-11-25 19:12:45,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:12:45,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:12:45,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:12:45,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:12:45,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:12:45,564 INFO L87 Difference]: Start difference. First operand 35988 states and 54549 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 2 states have call successors, (94), 2 states have call predecessors, (94), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2021-11-25 19:12:47,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:12:51,606 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:12:54,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:12:56,692 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:12:58,724 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:01,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:13:04,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:06,720 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:09,054 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:13:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:12,375 INFO L93 Difference]: Finished difference Result 48086 states and 73016 transitions. [2021-11-25 19:13:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:13:12,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 2 states have call successors, (94), 2 states have call predecessors, (94), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 952 [2021-11-25 19:13:12,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:12,698 INFO L225 Difference]: With dead ends: 48086 [2021-11-25 19:13:12,698 INFO L226 Difference]: Without dead ends: 47867 [2021-11-25 19:13:12,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 952 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:13:12,726 INFO L933 BasicCegarLoop]: 3095 mSDtfsCounter, 2579 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2593 SdHoareTripleChecker+Valid, 5523 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:12,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2593 Valid, 5523 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 673 Invalid, 7 Unknown, 0 Unchecked, 26.1s Time] [2021-11-25 19:13:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47867 states. [2021-11-25 19:13:14,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47867 to 47521. [2021-11-25 19:13:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47521 states, 34387 states have (on average 1.4558117893389944) internal successors, (50061), 34726 states have internal predecessors, (50061), 10733 states have call successors, (10733), 2397 states have call predecessors, (10733), 2400 states have return successors, (11390), 10681 states have call predecessors, (11390), 10732 states have call successors, (11390) [2021-11-25 19:13:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47521 states to 47521 states and 72184 transitions. [2021-11-25 19:13:15,544 INFO L78 Accepts]: Start accepts. Automaton has 47521 states and 72184 transitions. Word has length 952 [2021-11-25 19:13:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:15,546 INFO L470 AbstractCegarLoop]: Abstraction has 47521 states and 72184 transitions. [2021-11-25 19:13:15,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 2 states have call successors, (94), 2 states have call predecessors, (94), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2021-11-25 19:13:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 47521 states and 72184 transitions. [2021-11-25 19:13:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 989 [2021-11-25 19:13:15,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:15,638 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:13:15,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:13:15,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:13:15,862 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:13:15,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:15,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1175066413, now seen corresponding path program 1 times [2021-11-25 19:13:15,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:13:15,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587110384] [2021-11-25 19:13:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:15,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:13:16,475 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:13:16,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622948993] [2021-11-25 19:13:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:16,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:13:16,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:13:16,480 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:13:16,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:13:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:19,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 10431 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:13:19,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18581 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18581 trivial. 0 not checked. [2021-11-25 19:13:23,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:13:23,171 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:13:23,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587110384] [2021-11-25 19:13:23,172 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:13:23,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622948993] [2021-11-25 19:13:23,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622948993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:13:23,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:13:23,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:13:23,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184958815] [2021-11-25 19:13:23,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:13:23,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:13:23,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:13:23,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:13:23,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:13:23,177 INFO L87 Difference]: Start difference. First operand 47521 states and 72184 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 1 states have call predecessors, (94), 1 states have call successors, (94) [2021-11-25 19:13:24,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:28,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:30,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:13:32,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:37,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:13:39,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:41,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:45,112 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:13:47,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:47,642 INFO L93 Difference]: Finished difference Result 54822 states and 83173 transitions. [2021-11-25 19:13:47,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:13:47,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 1 states have call predecessors, (94), 1 states have call successors, (94) Word has length 988 [2021-11-25 19:13:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:48,010 INFO L225 Difference]: With dead ends: 54822 [2021-11-25 19:13:48,010 INFO L226 Difference]: Without dead ends: 54603 [2021-11-25 19:13:48,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 986 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:13:48,047 INFO L933 BasicCegarLoop]: 3053 mSDtfsCounter, 2497 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2511 SdHoareTripleChecker+Valid, 5481 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:48,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2511 Valid, 5481 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 664 Invalid, 6 Unknown, 0 Unchecked, 23.5s Time] [2021-11-25 19:13:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54603 states. [2021-11-25 19:13:50,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54603 to 54253. [2021-11-25 19:13:50,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54253 states, 39210 states have (on average 1.455087987758225) internal successors, (57054), 39598 states have internal predecessors, (57054), 12267 states have call successors, (12267), 2772 states have call predecessors, (12267), 2775 states have return successors, (13016), 12199 states have call predecessors, (13016), 12266 states have call successors, (13016) [2021-11-25 19:13:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54253 states to 54253 states and 82337 transitions. [2021-11-25 19:13:50,933 INFO L78 Accepts]: Start accepts. Automaton has 54253 states and 82337 transitions. Word has length 988 [2021-11-25 19:13:50,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:50,935 INFO L470 AbstractCegarLoop]: Abstraction has 54253 states and 82337 transitions. [2021-11-25 19:13:50,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 1 states have call predecessors, (94), 1 states have call successors, (94) [2021-11-25 19:13:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 54253 states and 82337 transitions. [2021-11-25 19:13:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 996 [2021-11-25 19:13:51,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:51,020 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1] [2021-11-25 19:13:51,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-25 19:13:51,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:13:51,244 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:13:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:51,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1727407088, now seen corresponding path program 1 times [2021-11-25 19:13:51,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:13:51,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076230513] [2021-11-25 19:13:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:51,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:13:51,903 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:13:51,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734310729] [2021-11-25 19:13:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:51,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:13:51,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:13:51,906 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:13:51,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:13:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:54,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 11274 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:13:54,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18564 backedges. 1769 proven. 0 refuted. 0 times theorem prover too weak. 16795 trivial. 0 not checked. [2021-11-25 19:13:56,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:13:56,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:13:56,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076230513] [2021-11-25 19:13:56,868 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:13:56,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734310729] [2021-11-25 19:13:56,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734310729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:13:56,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:13:56,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:13:56,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791971494] [2021-11-25 19:13:56,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:13:56,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:13:56,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:13:56,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:13:56,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:13:56,873 INFO L87 Difference]: Start difference. First operand 54253 states and 82337 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 3 states have call successors, (95), 3 states have call predecessors, (95), 2 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) [2021-11-25 19:13:58,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:01,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:03,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:05,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:14:07,239 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:10,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:14:12,605 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:14,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:18,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:21,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:14:22,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:14:22,725 INFO L93 Difference]: Finished difference Result 90128 states and 136773 transitions. [2021-11-25 19:14:22,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:14:22,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 3 states have call successors, (95), 3 states have call predecessors, (95), 2 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) Word has length 995 [2021-11-25 19:14:22,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:14:23,204 INFO L225 Difference]: With dead ends: 90128 [2021-11-25 19:14:23,204 INFO L226 Difference]: Without dead ends: 66393 [2021-11-25 19:14:23,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 993 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:14:23,321 INFO L933 BasicCegarLoop]: 3312 mSDtfsCounter, 2525 mSDsluCounter, 2928 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2525 SdHoareTripleChecker+Valid, 5911 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:14:23,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2525 Valid, 5911 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 706 Invalid, 5 Unknown, 0 Unchecked, 24.6s Time] [2021-11-25 19:14:23,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66393 states. [2021-11-25 19:14:25,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66393 to 65661. [2021-11-25 19:14:25,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65661 states, 47460 states have (on average 1.4553308048883271) internal successors, (69070), 47913 states have internal predecessors, (69070), 14861 states have call successors, (14861), 3336 states have call predecessors, (14861), 3339 states have return successors, (15714), 14785 states have call predecessors, (15714), 14860 states have call successors, (15714) [2021-11-25 19:14:26,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65661 states to 65661 states and 99645 transitions. [2021-11-25 19:14:26,411 INFO L78 Accepts]: Start accepts. Automaton has 65661 states and 99645 transitions. Word has length 995 [2021-11-25 19:14:26,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:14:26,412 INFO L470 AbstractCegarLoop]: Abstraction has 65661 states and 99645 transitions. [2021-11-25 19:14:26,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 3 states have call successors, (95), 3 states have call predecessors, (95), 2 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) [2021-11-25 19:14:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 65661 states and 99645 transitions. [2021-11-25 19:14:26,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1014 [2021-11-25 19:14:26,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:14:26,526 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2021-11-25 19:14:26,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:14:26,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:14:26,752 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:14:26,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:14:26,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1670570771, now seen corresponding path program 1 times [2021-11-25 19:14:26,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:14:26,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120597359] [2021-11-25 19:14:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:14:26,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:14:27,403 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:14:27,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735965795] [2021-11-25 19:14:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:14:27,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:14:27,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:14:27,405 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:14:27,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:14:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:14:30,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 11336 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:14:30,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:14:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18570 backedges. 1775 proven. 0 refuted. 0 times theorem prover too weak. 16795 trivial. 0 not checked. [2021-11-25 19:14:32,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:14:32,237 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:14:32,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120597359] [2021-11-25 19:14:32,237 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:14:32,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735965795] [2021-11-25 19:14:32,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735965795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:14:32,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:14:32,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:14:32,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149222005] [2021-11-25 19:14:32,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:14:32,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:14:32,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:14:32,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:14:32,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:14:32,241 INFO L87 Difference]: Start difference. First operand 65661 states and 99645 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 3 states have call successors, (102), 3 states have call predecessors, (102), 3 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2021-11-25 19:14:35,216 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:38,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:42,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:14:44,991 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:14:47,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:49,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:54,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:14:54,395 INFO L93 Difference]: Finished difference Result 110782 states and 167890 transitions. [2021-11-25 19:14:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:14:54,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 3 states have call successors, (102), 3 states have call predecessors, (102), 3 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) Word has length 1013 [2021-11-25 19:14:54,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:14:54,721 INFO L225 Difference]: With dead ends: 110782 [2021-11-25 19:14:54,721 INFO L226 Difference]: Without dead ends: 69811 [2021-11-25 19:14:54,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 1011 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:14:54,877 INFO L933 BasicCegarLoop]: 2955 mSDtfsCounter, 2086 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 15 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2106 SdHoareTripleChecker+Valid, 5208 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:14:54,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2106 Valid, 5208 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 691 Invalid, 6 Unknown, 0 Unchecked, 20.5s Time] [2021-11-25 19:14:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69811 states. [2021-11-25 19:14:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69811 to 69723. [2021-11-25 19:14:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69723 states, 50430 states have (on average 1.4543129089827485) internal successors, (73341), 50951 states have internal predecessors, (73341), 15592 states have call successors, (15592), 3679 states have call predecessors, (15592), 3700 states have return successors, (16590), 15494 states have call predecessors, (16590), 15591 states have call successors, (16590) [2021-11-25 19:14:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69723 states to 69723 states and 105523 transitions. [2021-11-25 19:14:57,876 INFO L78 Accepts]: Start accepts. Automaton has 69723 states and 105523 transitions. Word has length 1013 [2021-11-25 19:14:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:14:57,878 INFO L470 AbstractCegarLoop]: Abstraction has 69723 states and 105523 transitions. [2021-11-25 19:14:57,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 3 states have call successors, (102), 3 states have call predecessors, (102), 3 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2021-11-25 19:14:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 69723 states and 105523 transitions. [2021-11-25 19:14:57,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2021-11-25 19:14:57,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:14:57,950 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1] [2021-11-25 19:14:58,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:14:58,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:14:58,169 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:14:58,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:14:58,169 INFO L85 PathProgramCache]: Analyzing trace with hash 338839995, now seen corresponding path program 1 times [2021-11-25 19:14:58,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:14:58,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793459804] [2021-11-25 19:14:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:14:58,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:14:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:14:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18581 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18552 trivial. 0 not checked. [2021-11-25 19:14:59,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:14:59,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793459804] [2021-11-25 19:14:59,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793459804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:14:59,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:14:59,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:14:59,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316193747] [2021-11-25 19:14:59,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:14:59,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:14:59,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:14:59,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:14:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:14:59,341 INFO L87 Difference]: Start difference. First operand 69723 states and 105523 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) [2021-11-25 19:15:01,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:03,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:07,037 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:11,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:15:14,383 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:15:17,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:19,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:21,156 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:24,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:24,740 INFO L93 Difference]: Finished difference Result 139060 states and 210489 transitions. [2021-11-25 19:15:24,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:15:24,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) Word has length 1001 [2021-11-25 19:15:24,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:25,052 INFO L225 Difference]: With dead ends: 139060 [2021-11-25 19:15:25,052 INFO L226 Difference]: Without dead ends: 69745 [2021-11-25 19:15:25,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:15:25,439 INFO L933 BasicCegarLoop]: 2629 mSDtfsCounter, 0 mSDsluCounter, 2960 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5256 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:25,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 5256 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 668 Invalid, 5 Unknown, 0 Unchecked, 23.7s Time] [2021-11-25 19:15:25,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69745 states. [2021-11-25 19:15:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69745 to 69745. [2021-11-25 19:15:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69745 states, 50452 states have (on average 1.4541148021882184) internal successors, (73363), 50973 states have internal predecessors, (73363), 15592 states have call successors, (15592), 3679 states have call predecessors, (15592), 3700 states have return successors, (16590), 15494 states have call predecessors, (16590), 15591 states have call successors, (16590) [2021-11-25 19:15:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69745 states to 69745 states and 105545 transitions. [2021-11-25 19:15:28,286 INFO L78 Accepts]: Start accepts. Automaton has 69745 states and 105545 transitions. Word has length 1001 [2021-11-25 19:15:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:28,287 INFO L470 AbstractCegarLoop]: Abstraction has 69745 states and 105545 transitions. [2021-11-25 19:15:28,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) [2021-11-25 19:15:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 69745 states and 105545 transitions. [2021-11-25 19:15:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1003 [2021-11-25 19:15:28,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:28,384 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2021-11-25 19:15:28,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 19:15:28,385 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:28,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:28,386 INFO L85 PathProgramCache]: Analyzing trace with hash -509211544, now seen corresponding path program 1 times [2021-11-25 19:15:28,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:15:28,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962504060] [2021-11-25 19:15:28,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:28,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:15:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18582 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 18552 trivial. 0 not checked. [2021-11-25 19:15:29,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:15:29,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962504060] [2021-11-25 19:15:29,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962504060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:15:29,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469479442] [2021-11-25 19:15:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:29,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:29,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:29,588 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:15:29,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:15:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:32,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 10429 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:15:32,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18582 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18582 trivial. 0 not checked. [2021-11-25 19:15:36,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:15:36,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469479442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:15:36,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:15:36,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-25 19:15:36,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007799461] [2021-11-25 19:15:36,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:15:36,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:15:36,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:15:36,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:15:36,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:15:36,203 INFO L87 Difference]: Start difference. First operand 69745 states and 105545 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 1 states have call predecessors, (94), 1 states have call successors, (94) [2021-11-25 19:15:38,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:40,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:43,669 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:46,313 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:48,589 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:15:51,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:15:54,087 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:56,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:00,079 INFO L93 Difference]: Finished difference Result 76109 states and 115211 transitions. [2021-11-25 19:16:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:16:00,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 1 states have call predecessors, (94), 1 states have call successors, (94) Word has length 1002 [2021-11-25 19:16:00,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:00,538 INFO L225 Difference]: With dead ends: 76109 [2021-11-25 19:16:00,538 INFO L226 Difference]: Without dead ends: 75890 [2021-11-25 19:16:00,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 1002 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:16:00,575 INFO L933 BasicCegarLoop]: 3108 mSDtfsCounter, 2423 mSDsluCounter, 2756 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2451 SdHoareTripleChecker+Valid, 5536 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:00,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2451 Valid, 5536 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 682 Invalid, 8 Unknown, 0 Unchecked, 22.7s Time] [2021-11-25 19:16:00,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75890 states. [2021-11-25 19:16:02,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75890 to 75536. [2021-11-25 19:16:02,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75536 states, 54641 states have (on average 1.4542376603649274) internal successors, (79461), 55207 states have internal predecessors, (79461), 16886 states have call successors, (16886), 3986 states have call predecessors, (16886), 4008 states have return successors, (18024), 16774 states have call predecessors, (18024), 16885 states have call successors, (18024) [2021-11-25 19:16:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75536 states to 75536 states and 114371 transitions. [2021-11-25 19:16:03,507 INFO L78 Accepts]: Start accepts. Automaton has 75536 states and 114371 transitions. Word has length 1002 [2021-11-25 19:16:03,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:03,508 INFO L470 AbstractCegarLoop]: Abstraction has 75536 states and 114371 transitions. [2021-11-25 19:16:03,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 1 states have call predecessors, (94), 1 states have call successors, (94) [2021-11-25 19:16:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 75536 states and 114371 transitions. [2021-11-25 19:16:03,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1046 [2021-11-25 19:16:03,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:03,639 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:03,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:03,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:16:03,840 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:03,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1044684873, now seen corresponding path program 1 times [2021-11-25 19:16:03,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:03,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362669453] [2021-11-25 19:16:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:03,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:04,474 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:16:04,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215415498] [2021-11-25 19:16:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:04,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:16:04,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:16:04,476 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:16:04,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:16:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:08,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 11126 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:16:08,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18661 backedges. 1784 proven. 0 refuted. 0 times theorem prover too weak. 16877 trivial. 0 not checked. [2021-11-25 19:16:10,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:16:10,435 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:10,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362669453] [2021-11-25 19:16:10,435 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:16:10,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215415498] [2021-11-25 19:16:10,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215415498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:10,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:10,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:16:10,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169328127] [2021-11-25 19:16:10,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:10,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:16:10,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:10,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:16:10,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:16:10,439 INFO L87 Difference]: Start difference. First operand 75536 states and 114371 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 3 states have call successors, (94), 3 states have call predecessors, (94), 2 states have return successors, (93), 2 states have call predecessors, (93), 2 states have call successors, (93) [2021-11-25 19:16:12,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:16,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:18,643 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:20,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:16:23,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:25,747 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:16:28,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:31,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:36,518 INFO L93 Difference]: Finished difference Result 126955 states and 192140 transitions. [2021-11-25 19:16:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:16:36,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 3 states have call successors, (94), 3 states have call predecessors, (94), 2 states have return successors, (93), 2 states have call predecessors, (93), 2 states have call successors, (93) Word has length 1045 [2021-11-25 19:16:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:37,132 INFO L225 Difference]: With dead ends: 126955 [2021-11-25 19:16:37,132 INFO L226 Difference]: Without dead ends: 88808 [2021-11-25 19:16:37,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1043 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:16:37,248 INFO L933 BasicCegarLoop]: 3300 mSDtfsCounter, 2462 mSDsluCounter, 2928 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2476 SdHoareTripleChecker+Valid, 5899 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:37,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2476 Valid, 5899 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 706 Invalid, 6 Unknown, 0 Unchecked, 24.2s Time] [2021-11-25 19:16:37,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88808 states. [2021-11-25 19:16:40,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88808 to 87038. [2021-11-25 19:16:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87038 states, 62939 states have (on average 1.4544400133462558) internal successors, (91541), 63584 states have internal predecessors, (91541), 19490 states have call successors, (19490), 4584 states have call predecessors, (19490), 4608 states have return successors, (20806), 19358 states have call predecessors, (20806), 19489 states have call successors, (20806) [2021-11-25 19:16:40,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87038 states to 87038 states and 131837 transitions. [2021-11-25 19:16:40,852 INFO L78 Accepts]: Start accepts. Automaton has 87038 states and 131837 transitions. Word has length 1045 [2021-11-25 19:16:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:40,854 INFO L470 AbstractCegarLoop]: Abstraction has 87038 states and 131837 transitions. [2021-11-25 19:16:40,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 3 states have call successors, (94), 3 states have call predecessors, (94), 2 states have return successors, (93), 2 states have call predecessors, (93), 2 states have call successors, (93) [2021-11-25 19:16:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 87038 states and 131837 transitions. [2021-11-25 19:16:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1047 [2021-11-25 19:16:41,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:41,001 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:41,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-25 19:16:41,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 19:16:41,202 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:41,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:41,203 INFO L85 PathProgramCache]: Analyzing trace with hash -167995547, now seen corresponding path program 1 times [2021-11-25 19:16:41,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:41,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221728958] [2021-11-25 19:16:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:41,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:41,563 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:16:41,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147029119] [2021-11-25 19:16:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:41,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:16:41,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:16:41,568 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:16:41,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:16:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:44,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 11060 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:16:44,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18661 backedges. 1784 proven. 0 refuted. 0 times theorem prover too weak. 16877 trivial. 0 not checked. [2021-11-25 19:16:46,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:16:46,834 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:46,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221728958] [2021-11-25 19:16:46,834 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:16:46,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147029119] [2021-11-25 19:16:46,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147029119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:46,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:46,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:16:46,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709021184] [2021-11-25 19:16:46,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:46,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:16:46,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:46,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:16:46,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:16:46,838 INFO L87 Difference]: Start difference. First operand 87038 states and 131837 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 3 states have call successors, (94), 3 states have call predecessors, (94), 2 states have return successors, (93), 2 states have call predecessors, (93), 2 states have call successors, (93) [2021-11-25 19:16:48,904 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:52,941 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:56,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:16:58,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:00,871 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:17:03,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:05,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:08,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:13,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:17:13,064 INFO L93 Difference]: Finished difference Result 150174 states and 227371 transitions. [2021-11-25 19:17:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:17:13,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 3 states have call successors, (94), 3 states have call predecessors, (94), 2 states have return successors, (93), 2 states have call predecessors, (93), 2 states have call successors, (93) Word has length 1046 [2021-11-25 19:17:13,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:17:13,671 INFO L225 Difference]: With dead ends: 150174 [2021-11-25 19:17:13,671 INFO L226 Difference]: Without dead ends: 88033 [2021-11-25 19:17:13,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1045 GetRequests, 1044 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:17:13,841 INFO L933 BasicCegarLoop]: 3315 mSDtfsCounter, 2460 mSDsluCounter, 2927 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2474 SdHoareTripleChecker+Valid, 5914 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:17:13,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2474 Valid, 5914 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 704 Invalid, 7 Unknown, 0 Unchecked, 24.3s Time] [2021-11-25 19:17:13,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88033 states. [2021-11-25 19:17:16,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88033 to 86269. [2021-11-25 19:17:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86269 states, 62376 states have (on average 1.4544055405925356) internal successors, (90720), 62995 states have internal predecessors, (90720), 19342 states have call successors, (19342), 4525 states have call predecessors, (19342), 4550 states have return successors, (20672), 19211 states have call predecessors, (20672), 19341 states have call successors, (20672) [2021-11-25 19:17:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86269 states to 86269 states and 130734 transitions. [2021-11-25 19:17:17,456 INFO L78 Accepts]: Start accepts. Automaton has 86269 states and 130734 transitions. Word has length 1046 [2021-11-25 19:17:17,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:17:17,458 INFO L470 AbstractCegarLoop]: Abstraction has 86269 states and 130734 transitions. [2021-11-25 19:17:17,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 3 states have call successors, (94), 3 states have call predecessors, (94), 2 states have return successors, (93), 2 states have call predecessors, (93), 2 states have call successors, (93) [2021-11-25 19:17:17,459 INFO L276 IsEmpty]: Start isEmpty. Operand 86269 states and 130734 transitions. [2021-11-25 19:17:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1064 [2021-11-25 19:17:17,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:17:17,623 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:17:17,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:17:17,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:17:17,824 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:17:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:17:17,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2083482362, now seen corresponding path program 1 times [2021-11-25 19:17:17,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:17:17,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479925478] [2021-11-25 19:17:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:17,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:17:18,208 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:17:18,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118097612] [2021-11-25 19:17:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:18,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:17:18,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:17:18,211 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:17:18,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:17:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:17:21,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 11188 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:17:21,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:17:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18667 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18667 trivial. 0 not checked. [2021-11-25 19:17:25,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:17:25,313 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:17:25,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479925478] [2021-11-25 19:17:25,313 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:17:25,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118097612] [2021-11-25 19:17:25,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118097612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:17:25,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:17:25,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:17:25,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549505717] [2021-11-25 19:17:25,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:17:25,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:17:25,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:17:25,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:17:25,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:17:25,317 INFO L87 Difference]: Start difference. First operand 86269 states and 130734 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 2 states have call successors, (99), 2 states have call predecessors, (99), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) [2021-11-25 19:17:27,386 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:31,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:32,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:37,430 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:17:39,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:41,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:44,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:46,747 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:17:49,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:17:53,237 INFO L93 Difference]: Finished difference Result 122477 states and 185536 transitions. [2021-11-25 19:17:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:17:53,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 2 states have call successors, (99), 2 states have call predecessors, (99), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) Word has length 1063 [2021-11-25 19:17:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:17:53,778 INFO L225 Difference]: With dead ends: 122477 [2021-11-25 19:17:53,778 INFO L226 Difference]: Without dead ends: 122258 [2021-11-25 19:17:53,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 1061 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:17:53,823 INFO L933 BasicCegarLoop]: 3058 mSDtfsCounter, 2489 mSDsluCounter, 2760 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2489 SdHoareTripleChecker+Valid, 5486 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:17:53,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2489 Valid, 5486 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 665 Invalid, 7 Unknown, 0 Unchecked, 25.7s Time] [2021-11-25 19:17:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122258 states. [2021-11-25 19:17:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122258 to 115338. [2021-11-25 19:17:57,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115338 states, 83346 states have (on average 1.4542869483838456) internal successors, (121209), 84177 states have internal predecessors, (121209), 25911 states have call successors, (25911), 6043 states have call predecessors, (25911), 6080 states have return successors, (27637), 25744 states have call predecessors, (27637), 25910 states have call successors, (27637) [2021-11-25 19:17:58,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115338 states to 115338 states and 174757 transitions. [2021-11-25 19:17:58,857 INFO L78 Accepts]: Start accepts. Automaton has 115338 states and 174757 transitions. Word has length 1063 [2021-11-25 19:17:58,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:17:58,858 INFO L470 AbstractCegarLoop]: Abstraction has 115338 states and 174757 transitions. [2021-11-25 19:17:58,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 2 states have call successors, (99), 2 states have call predecessors, (99), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) [2021-11-25 19:17:58,859 INFO L276 IsEmpty]: Start isEmpty. Operand 115338 states and 174757 transitions. [2021-11-25 19:17:59,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1080 [2021-11-25 19:17:59,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:17:59,008 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:17:59,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-25 19:17:59,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 19:17:59,209 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:17:59,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:17:59,210 INFO L85 PathProgramCache]: Analyzing trace with hash 955570341, now seen corresponding path program 1 times [2021-11-25 19:17:59,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:17:59,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324485223] [2021-11-25 19:17:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:59,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:17:59,597 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:17:59,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049683531] [2021-11-25 19:17:59,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:59,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:17:59,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:17:59,600 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:17:59,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:18:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:18:03,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 11705 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:18:03,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:18:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18633 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18633 trivial. 0 not checked. [2021-11-25 19:18:07,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:18:07,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:18:07,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324485223] [2021-11-25 19:18:07,037 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:18:07,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049683531] [2021-11-25 19:18:07,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049683531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:18:07,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:18:07,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:18:07,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327939256] [2021-11-25 19:18:07,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:18:07,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:18:07,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:18:07,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:18:07,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:18:07,040 INFO L87 Difference]: Start difference. First operand 115338 states and 174757 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 2 states have call successors, (109), 2 states have call predecessors, (109), 1 states have return successors, (108), 1 states have call predecessors, (108), 1 states have call successors, (108) [2021-11-25 19:18:09,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:18:10,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:18:13,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:18:15,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:18:18,119 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:18:20,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:18:23,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:18:24,634 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:18:29,229 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:18:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:18:35,573 INFO L93 Difference]: Finished difference Result 164665 states and 249489 transitions. [2021-11-25 19:18:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:18:35,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 2 states have call successors, (109), 2 states have call predecessors, (109), 1 states have return successors, (108), 1 states have call predecessors, (108), 1 states have call successors, (108) Word has length 1079 [2021-11-25 19:18:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:18:36,351 INFO L225 Difference]: With dead ends: 164665 [2021-11-25 19:18:36,351 INFO L226 Difference]: Without dead ends: 164446 [2021-11-25 19:18:36,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1078 GetRequests, 1077 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:18:36,422 INFO L933 BasicCegarLoop]: 3090 mSDtfsCounter, 2532 mSDsluCounter, 2759 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2546 SdHoareTripleChecker+Valid, 5518 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:18:36,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2546 Valid, 5518 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 664 Invalid, 6 Unknown, 0 Unchecked, 25.6s Time] [2021-11-25 19:18:36,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164446 states. [2021-11-25 19:18:42,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164446 to 163740. [2021-11-25 19:18:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163740 states, 118351 states have (on average 1.4544110315924665) internal successors, (172131), 119542 states have internal predecessors, (172131), 36779 states have call successors, (36779), 8563 states have call predecessors, (36779), 8609 states have return successors, (39189), 36531 states have call predecessors, (39189), 36778 states have call successors, (39189) [2021-11-25 19:18:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163740 states to 163740 states and 248099 transitions. [2021-11-25 19:18:43,651 INFO L78 Accepts]: Start accepts. Automaton has 163740 states and 248099 transitions. Word has length 1079 [2021-11-25 19:18:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:18:43,652 INFO L470 AbstractCegarLoop]: Abstraction has 163740 states and 248099 transitions. [2021-11-25 19:18:43,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 2 states have call successors, (109), 2 states have call predecessors, (109), 1 states have return successors, (108), 1 states have call predecessors, (108), 1 states have call successors, (108) [2021-11-25 19:18:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 163740 states and 248099 transitions. [2021-11-25 19:18:43,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1094 [2021-11-25 19:18:43,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:18:43,841 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2021-11-25 19:18:43,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-25 19:18:44,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 19:18:44,042 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:18:44,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:18:44,043 INFO L85 PathProgramCache]: Analyzing trace with hash 173033456, now seen corresponding path program 1 times [2021-11-25 19:18:44,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:18:44,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781686479] [2021-11-25 19:18:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:18:44,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:18:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:18:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18634 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 18595 trivial. 0 not checked. [2021-11-25 19:18:45,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:18:45,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781686479] [2021-11-25 19:18:45,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781686479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:18:45,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122634972] [2021-11-25 19:18:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:18:45,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:18:45,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:18:45,329 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:18:45,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef783402-6514-4c5b-a575-9501587ea16b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process