./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 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/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_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:27:17,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:27:17,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:27:17,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:27:17,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:27:17,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:27:17,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:27:17,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:27:17,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:27:17,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:27:17,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:27:17,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:27:17,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:27:17,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:27:17,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:27:17,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:27:17,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:27:17,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:27:17,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:27:17,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:27:17,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:27:17,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:27:17,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:27:17,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:27:17,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:27:17,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:27:17,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:27:17,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:27:17,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:27:17,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:27:17,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:27:17,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:27:17,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:27:17,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:27:17,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:27:17,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:27:17,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:27:17,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:27:17,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:27:17,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:27:17,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:27:17,272 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:27:17,306 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:27:17,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:27:17,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:27:17,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:27:17,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:27:17,317 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:27:17,317 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:27:17,317 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:27:17,317 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:27:17,318 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:27:17,319 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:27:17,319 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:27:17,319 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:27:17,319 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:27:17,320 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:27:17,320 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:27:17,320 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:27:17,320 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:27:17,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:27:17,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:27:17,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:27:17,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:27:17,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:27:17,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:27:17,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:27:17,324 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:27:17,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:27:17,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:27:17,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:27:17,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:27:17,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:27:17,325 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:27:17,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:27:17,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:27:17,326 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:27:17,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:27:17,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:27:17,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:27:17,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eca061443980e8d0803d9e641f2f399e16662610ff9edce1dac481c57666d01d [2022-11-03 03:27:17,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:27:17,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:27:17,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:27:17,679 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:27:17,680 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:27:17,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/../../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 [2022-11-03 03:27:17,783 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/data/50bfbb663/f1bf722610dc4f5e9957c678b6606c58/FLAGd199158b8 [2022-11-03 03:27:18,816 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:27:18,817 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/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 [2022-11-03 03:27:18,873 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/data/50bfbb663/f1bf722610dc4f5e9957c678b6606c58/FLAGd199158b8 [2022-11-03 03:27:19,222 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/data/50bfbb663/f1bf722610dc4f5e9957c678b6606c58 [2022-11-03 03:27:19,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:27:19,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:27:19,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:27:19,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:27:19,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:27:19,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:27:19" (1/1) ... [2022-11-03 03:27:19,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27e537ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:19, skipping insertion in model container [2022-11-03 03:27:19,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:27:19" (1/1) ... [2022-11-03 03:27:19,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:27:19,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:27:21,831 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_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/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] [2022-11-03 03:27:21,894 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-03 03:27:21,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:27:22,000 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:27:22,538 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_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/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] [2022-11-03 03:27:22,548 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-03 03:27:22,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:27:22,777 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:27:22,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:22 WrapperNode [2022-11-03 03:27:22,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:27:22,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:27:22,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:27:22,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:27:22,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:22" (1/1) ... [2022-11-03 03:27:22,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:22" (1/1) ... [2022-11-03 03:27:23,419 INFO L138 Inliner]: procedures = 266, calls = 4385, calls flagged for inlining = 129, calls inlined = 122, statements flattened = 9430 [2022-11-03 03:27:23,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:27:23,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:27:23,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:27:23,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:27:23,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:22" (1/1) ... [2022-11-03 03:27:23,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:22" (1/1) ... [2022-11-03 03:27:23,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:22" (1/1) ... [2022-11-03 03:27:23,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:22" (1/1) ... [2022-11-03 03:27:23,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:22" (1/1) ... [2022-11-03 03:27:23,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:22" (1/1) ... [2022-11-03 03:27:24,011 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:22" (1/1) ... [2022-11-03 03:27:24,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:22" (1/1) ... [2022-11-03 03:27:24,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:27:24,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:27:24,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:27:24,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:27:24,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:22" (1/1) ... [2022-11-03 03:27:24,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:27:24,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:24,208 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:27:24,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:27:24,344 INFO L130 BoogieDeclarations]: Found specification of procedure __scsi_print_sense [2022-11-03 03:27:24,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __scsi_print_sense [2022-11-03 03:27:24,345 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-03 03:27:24,345 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-03 03:27:24,345 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-11-03 03:27:24,345 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_del [2022-11-03 03:27:24,345 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_del [2022-11-03 03:27:24,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 03:27:24,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 03:27:24,346 INFO L130 BoogieDeclarations]: Found specification of procedure driver_remove_file [2022-11-03 03:27:24,346 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_remove_file [2022-11-03 03:27:24,346 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 03:27:24,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 03:27:24,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 03:27:24,358 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 03:27:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure find_partition [2022-11-03 03:27:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure find_partition [2022-11-03 03:27:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2022-11-03 03:27:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2022-11-03 03:27:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2022-11-03 03:27:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2022-11-03 03:27:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-03 03:27:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-03 03:27:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-03 03:27:24,360 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-03 03:27:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 03:27:24,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 03:27:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure class_unregister [2022-11-03 03:27:24,360 INFO L138 BoogieDeclarations]: Found implementation of procedure class_unregister [2022-11-03 03:27:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible_nested [2022-11-03 03:27:24,360 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible_nested [2022-11-03 03:27:24,361 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 03:27:24,361 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 03:27:24,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 03:27:24,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 03:27:24,361 INFO L130 BoogieDeclarations]: Found specification of procedure tape_name [2022-11-03 03:27:24,361 INFO L138 BoogieDeclarations]: Found implementation of procedure tape_name [2022-11-03 03:27:24,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 03:27:24,361 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 03:27:24,362 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:27:24,362 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:27:24,362 INFO L130 BoogieDeclarations]: Found specification of procedure st_int_ioctl [2022-11-03 03:27:24,362 INFO L138 BoogieDeclarations]: Found implementation of procedure st_int_ioctl [2022-11-03 03:27:24,362 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_rq_timeout [2022-11-03 03:27:24,362 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_rq_timeout [2022-11-03 03:27:24,362 INFO L130 BoogieDeclarations]: Found specification of procedure set_mode_densblk [2022-11-03 03:27:24,362 INFO L138 BoogieDeclarations]: Found implementation of procedure set_mode_densblk [2022-11-03 03:27:24,363 INFO L130 BoogieDeclarations]: Found specification of procedure ktime_get [2022-11-03 03:27:24,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ktime_get [2022-11-03 03:27:24,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:27:24,363 INFO L130 BoogieDeclarations]: Found specification of procedure atomic64_read [2022-11-03 03:27:24,363 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic64_read [2022-11-03 03:27:24,363 INFO L130 BoogieDeclarations]: Found specification of procedure read_mode_page [2022-11-03 03:27:24,363 INFO L138 BoogieDeclarations]: Found implementation of procedure read_mode_page [2022-11-03 03:27:24,363 INFO L130 BoogieDeclarations]: Found specification of procedure do_door_lock [2022-11-03 03:27:24,363 INFO L138 BoogieDeclarations]: Found implementation of procedure do_door_lock [2022-11-03 03:27:24,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:27:24,364 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2022-11-03 03:27:24,364 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2022-11-03 03:27:24,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-03 03:27:24,364 INFO L130 BoogieDeclarations]: Found specification of procedure st_do_scsi [2022-11-03 03:27:24,364 INFO L138 BoogieDeclarations]: Found implementation of procedure st_do_scsi [2022-11-03 03:27:24,364 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2022-11-03 03:27:24,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-03 03:27:24,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-03 03:27:24,365 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-11-03 03:27:24,365 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-11-03 03:27:24,365 INFO L130 BoogieDeclarations]: Found specification of procedure atomic64_inc [2022-11-03 03:27:24,365 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic64_inc [2022-11-03 03:27:24,365 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2022-11-03 03:27:24,365 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2022-11-03 03:27:24,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:27:24,365 INFO L130 BoogieDeclarations]: Found specification of procedure st_release_request [2022-11-03 03:27:24,365 INFO L138 BoogieDeclarations]: Found implementation of procedure st_release_request [2022-11-03 03:27:24,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:27:24,366 INFO L130 BoogieDeclarations]: Found specification of procedure remove_cdevs [2022-11-03 03:27:24,366 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_cdevs [2022-11-03 03:27:24,366 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2022-11-03 03:27:24,366 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2022-11-03 03:27:24,366 INFO L130 BoogieDeclarations]: Found specification of procedure get_location [2022-11-03 03:27:24,366 INFO L138 BoogieDeclarations]: Found implementation of procedure get_location [2022-11-03 03:27:24,366 INFO L130 BoogieDeclarations]: Found specification of procedure st_compression [2022-11-03 03:27:24,367 INFO L138 BoogieDeclarations]: Found implementation of procedure st_compression [2022-11-03 03:27:24,367 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_put_device [2022-11-03 03:27:24,367 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_put_device [2022-11-03 03:27:24,367 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-11-03 03:27:24,367 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-11-03 03:27:24,367 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-11-03 03:27:24,367 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-11-03 03:27:24,367 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-03 03:27:24,367 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-03 03:27:24,368 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 03:27:24,368 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 03:27:24,368 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-03 03:27:24,368 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-03 03:27:24,368 INFO L130 BoogieDeclarations]: Found specification of procedure check_tape [2022-11-03 03:27:24,368 INFO L138 BoogieDeclarations]: Found implementation of procedure check_tape [2022-11-03 03:27:24,368 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-03 03:27:24,368 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-03 03:27:24,369 INFO L130 BoogieDeclarations]: Found specification of procedure switch_partition [2022-11-03 03:27:24,369 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_partition [2022-11-03 03:27:24,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 03:27:24,369 INFO L130 BoogieDeclarations]: Found specification of procedure setup_buffering [2022-11-03 03:27:24,369 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_buffering [2022-11-03 03:27:24,369 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-03 03:27:24,369 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-03 03:27:24,369 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_tape_put [2022-11-03 03:27:24,370 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_tape_put [2022-11-03 03:27:24,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 03:27:24,370 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_cmd_ioctl [2022-11-03 03:27:24,370 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_cmd_ioctl [2022-11-03 03:27:24,370 INFO L130 BoogieDeclarations]: Found specification of procedure st_log_options [2022-11-03 03:27:24,370 INFO L138 BoogieDeclarations]: Found implementation of procedure st_log_options [2022-11-03 03:27:24,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:27:24,370 INFO L130 BoogieDeclarations]: Found specification of procedure create_one_cdev [2022-11-03 03:27:24,370 INFO L138 BoogieDeclarations]: Found implementation of procedure create_one_cdev [2022-11-03 03:27:24,371 INFO L130 BoogieDeclarations]: Found specification of procedure queue_dma_alignment [2022-11-03 03:27:24,371 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_dma_alignment [2022-11-03 03:27:24,371 INFO L130 BoogieDeclarations]: Found specification of procedure do_load_unload [2022-11-03 03:27:24,371 INFO L138 BoogieDeclarations]: Found implementation of procedure do_load_unload [2022-11-03 03:27:24,371 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush_write_buffer [2022-11-03 03:27:24,371 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush_write_buffer [2022-11-03 03:27:24,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 03:27:24,371 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 03:27:24,371 INFO L130 BoogieDeclarations]: Found specification of procedure enlarge_buffer [2022-11-03 03:27:24,371 INFO L138 BoogieDeclarations]: Found implementation of procedure enlarge_buffer [2022-11-03 03:27:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure cross_eof [2022-11-03 03:27:24,372 INFO L138 BoogieDeclarations]: Found implementation of procedure cross_eof [2022-11-03 03:27:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure st_chk_result [2022-11-03 03:27:24,372 INFO L138 BoogieDeclarations]: Found implementation of procedure st_chk_result [2022-11-03 03:27:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 03:27:24,372 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 03:27:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure write_behind_check [2022-11-03 03:27:24,372 INFO L138 BoogieDeclarations]: Found implementation of procedure write_behind_check [2022-11-03 03:27:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:27:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-03 03:27:24,373 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-03 03:27:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2022-11-03 03:27:24,373 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2022-11-03 03:27:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 03:27:24,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 03:27:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2022-11-03 03:27:24,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2022-11-03 03:27:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 03:27:24,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 03:27:24,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:27:24,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 03:27:24,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 03:27:24,374 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-03 03:27:24,374 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-03 03:27:24,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:27:24,395 INFO L130 BoogieDeclarations]: Found specification of procedure deb_space_print [2022-11-03 03:27:24,395 INFO L138 BoogieDeclarations]: Found implementation of procedure deb_space_print [2022-11-03 03:27:24,395 INFO L130 BoogieDeclarations]: Found specification of procedure flush_buffer [2022-11-03 03:27:24,395 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_buffer [2022-11-03 03:27:24,395 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2022-11-03 03:27:24,395 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2022-11-03 03:27:24,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:27:24,395 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-03 03:27:24,396 INFO L130 BoogieDeclarations]: Found specification of procedure driver_create_file [2022-11-03 03:27:24,396 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_create_file [2022-11-03 03:27:24,396 INFO L130 BoogieDeclarations]: Found specification of procedure release_buffering [2022-11-03 03:27:24,396 INFO L138 BoogieDeclarations]: Found implementation of procedure release_buffering [2022-11-03 03:27:24,396 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2022-11-03 03:27:24,396 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2022-11-03 03:27:24,396 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_buffer [2022-11-03 03:27:24,396 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_buffer [2022-11-03 03:27:24,396 INFO L130 BoogieDeclarations]: Found specification of procedure write_mode_page [2022-11-03 03:27:24,397 INFO L138 BoogieDeclarations]: Found implementation of procedure write_mode_page [2022-11-03 03:27:24,397 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush [2022-11-03 03:27:24,397 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush [2022-11-03 03:27:24,397 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-03 03:27:24,397 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-03 03:27:24,397 INFO L130 BoogieDeclarations]: Found specification of procedure rw_checks [2022-11-03 03:27:24,397 INFO L138 BoogieDeclarations]: Found implementation of procedure rw_checks [2022-11-03 03:27:24,397 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2022-11-03 03:27:24,397 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2022-11-03 03:27:24,398 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2022-11-03 03:27:24,398 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2022-11-03 03:27:24,398 INFO L130 BoogieDeclarations]: Found specification of procedure st_write [2022-11-03 03:27:24,398 INFO L138 BoogieDeclarations]: Found implementation of procedure st_write [2022-11-03 03:27:24,398 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-03 03:27:24,398 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-03 03:27:24,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:27:24,398 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_get_device [2022-11-03 03:27:24,399 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_get_device [2022-11-03 03:27:24,399 INFO L130 BoogieDeclarations]: Found specification of procedure set_location [2022-11-03 03:27:24,399 INFO L138 BoogieDeclarations]: Found implementation of procedure set_location [2022-11-03 03:27:24,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:27:24,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:27:24,399 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-03 03:27:24,399 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-03 03:27:25,695 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:27:25,698 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:27:25,836 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 03:27:38,796 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:27:44,046 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:27:44,047 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 03:27:44,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:44 BoogieIcfgContainer [2022-11-03 03:27:44,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:27:44,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:27:44,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:27:44,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:27:44,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:27:19" (1/3) ... [2022-11-03 03:27:44,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4c2a6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:27:44, skipping insertion in model container [2022-11-03 03:27:44,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:22" (2/3) ... [2022-11-03 03:27:44,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4c2a6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:27:44, skipping insertion in model container [2022-11-03 03:27:44,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:44" (3/3) ... [2022-11-03 03:27:44,070 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i [2022-11-03 03:27:44,090 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:27:44,090 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:27:44,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:27:44,216 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27fcb22a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:27:44,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:27:44,229 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) [2022-11-03 03:27:44,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2022-11-03 03:27:44,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:44,279 INFO L195 NwaCegarLoop]: 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] [2022-11-03 03:27:44,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:44,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1692167717, now seen corresponding path program 1 times [2022-11-03 03:27:44,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:44,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959533650] [2022-11-03 03:27:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:44,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16726 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16726 trivial. 0 not checked. [2022-11-03 03:27:46,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:46,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959533650] [2022-11-03 03:27:46,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959533650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:46,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:46,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:27:46,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304095658] [2022-11-03 03:27:46,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:46,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:27:46,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:46,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:27:46,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:27:46,897 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) [2022-11-03 03:27:49,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:27:53,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:27:55,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:27:58,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:01,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:03,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:05,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:08,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:28:10,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:28:12,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:12,347 INFO L93 Difference]: Finished difference Result 3766 states and 5747 transitions. [2022-11-03 03:28:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:28:12,350 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 [2022-11-03 03:28:12,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:12,423 INFO L225 Difference]: With dead ends: 3766 [2022-11-03 03:28:12,424 INFO L226 Difference]: Without dead ends: 3699 [2022-11-03 03:28:12,438 INFO L412 NwaCegarLoop]: 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 [2022-11-03 03:28:12,449 INFO L413 NwaCegarLoop]: 3118 mSDtfsCounter, 2759 mSDsluCounter, 2807 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 1 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2773 SdHoareTripleChecker+Valid, 5593 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:12,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2773 Valid, 5593 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 670 Invalid, 7 Unknown, 0 Unchecked, 25.1s Time] [2022-11-03 03:28:12,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2022-11-03 03:28:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3698. [2022-11-03 03:28:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3698 states, 2598 states have (on average 1.4407236335642801) internal successors, (3743), 2628 states have internal predecessors, (3743), 933 states have call successors, (933), 167 states have call predecessors, (933), 166 states have return successors, (946), 929 states have call predecessors, (946), 932 states have call successors, (946) [2022-11-03 03:28:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 5622 transitions. [2022-11-03 03:28:12,834 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 5622 transitions. Word has length 790 [2022-11-03 03:28:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:12,840 INFO L495 AbstractCegarLoop]: Abstraction has 3698 states and 5622 transitions. [2022-11-03 03:28:12,841 INFO L496 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) [2022-11-03 03:28:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 5622 transitions. [2022-11-03 03:28:12,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2022-11-03 03:28:12,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:12,888 INFO L195 NwaCegarLoop]: 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] [2022-11-03 03:28:12,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:28:12,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:12,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1640837243, now seen corresponding path program 1 times [2022-11-03 03:28:12,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:12,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322705221] [2022-11-03 03:28:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:13,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:28:13,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919068418] [2022-11-03 03:28:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:13,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:13,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:13,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:13,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:28:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:16,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 9692 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:28:16,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16735 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16726 trivial. 0 not checked. [2022-11-03 03:28:16,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:16,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:16,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322705221] [2022-11-03 03:28:16,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:28:16,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919068418] [2022-11-03 03:28:16,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919068418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:16,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:16,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:16,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648082024] [2022-11-03 03:28:16,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:16,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:28:16,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:16,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:28:16,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:28:16,957 INFO L87 Difference]: Start difference. First operand 3698 states and 5622 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) [2022-11-03 03:28:19,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:21,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:24,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:28,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:28:31,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:34,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:35,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:37,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:41,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:28:42,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:42,345 INFO L93 Difference]: Finished difference Result 8025 states and 12159 transitions. [2022-11-03 03:28:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:28:42,346 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 [2022-11-03 03:28:42,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:42,380 INFO L225 Difference]: With dead ends: 8025 [2022-11-03 03:28:42,380 INFO L226 Difference]: Without dead ends: 4464 [2022-11-03 03:28:42,402 INFO L412 NwaCegarLoop]: 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 [2022-11-03 03:28:42,403 INFO L413 NwaCegarLoop]: 2712 mSDtfsCounter, 533 mSDsluCounter, 2932 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 10 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 5315 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:42,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 5315 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 700 Invalid, 7 Unknown, 0 Unchecked, 25.1s Time] [2022-11-03 03:28:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4464 states. [2022-11-03 03:28:42,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4464 to 4458. [2022-11-03 03:28:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 3151 states have (on average 1.441447159631863) internal successors, (4542), 3196 states have internal predecessors, (4542), 1082 states have call successors, (1082), 225 states have call predecessors, (1082), 224 states have return successors, (1095), 1077 states have call predecessors, (1095), 1081 states have call successors, (1095) [2022-11-03 03:28:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 6719 transitions. [2022-11-03 03:28:42,780 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 6719 transitions. Word has length 851 [2022-11-03 03:28:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:42,783 INFO L495 AbstractCegarLoop]: Abstraction has 4458 states and 6719 transitions. [2022-11-03 03:28:42,784 INFO L496 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) [2022-11-03 03:28:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 6719 transitions. [2022-11-03 03:28:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2022-11-03 03:28:42,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:42,806 INFO L195 NwaCegarLoop]: 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] [2022-11-03 03:28:42,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 03:28:43,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:43,023 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:43,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:43,024 INFO L85 PathProgramCache]: Analyzing trace with hash -278240586, now seen corresponding path program 1 times [2022-11-03 03:28:43,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:43,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152689174] [2022-11-03 03:28:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:43,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16751 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 16748 trivial. 0 not checked. [2022-11-03 03:28:44,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:44,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152689174] [2022-11-03 03:28:44,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152689174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:44,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:44,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:44,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199490624] [2022-11-03 03:28:44,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:44,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:28:44,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:44,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:28:44,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:28:44,719 INFO L87 Difference]: Start difference. First operand 4458 states and 6719 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) [2022-11-03 03:28:46,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:49,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:51,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:56,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:28:59,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:01,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:03,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:05,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:08,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:12,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:15,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:29:17,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:29:19,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:29:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:21,821 INFO L93 Difference]: Finished difference Result 12584 states and 19047 transitions. [2022-11-03 03:29:21,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:21,823 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 [2022-11-03 03:29:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:21,886 INFO L225 Difference]: With dead ends: 12584 [2022-11-03 03:29:21,886 INFO L226 Difference]: Without dead ends: 8263 [2022-11-03 03:29:21,910 INFO L412 NwaCegarLoop]: 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 [2022-11-03 03:29:21,911 INFO L413 NwaCegarLoop]: 4497 mSDtfsCounter, 2525 mSDsluCounter, 2952 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 1 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2539 SdHoareTripleChecker+Valid, 7119 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:21,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2539 Valid, 7119 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 922 Invalid, 9 Unknown, 0 Unchecked, 36.7s Time] [2022-11-03 03:29:21,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2022-11-03 03:29:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 8254. [2022-11-03 03:29:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8254 states, 5915 states have (on average 1.452240067624683) internal successors, (8590), 5994 states have internal predecessors, (8590), 1944 states have call successors, (1944), 395 states have call predecessors, (1944), 394 states have return successors, (1985), 1933 states have call predecessors, (1985), 1943 states have call successors, (1985) [2022-11-03 03:29:22,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8254 states to 8254 states and 12519 transitions. [2022-11-03 03:29:22,374 INFO L78 Accepts]: Start accepts. Automaton has 8254 states and 12519 transitions. Word has length 879 [2022-11-03 03:29:22,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:22,376 INFO L495 AbstractCegarLoop]: Abstraction has 8254 states and 12519 transitions. [2022-11-03 03:29:22,377 INFO L496 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) [2022-11-03 03:29:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 8254 states and 12519 transitions. [2022-11-03 03:29:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 905 [2022-11-03 03:29:22,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:22,408 INFO L195 NwaCegarLoop]: 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] [2022-11-03 03:29:22,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:29:22,409 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:22,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:22,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1760802394, now seen corresponding path program 1 times [2022-11-03 03:29:22,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:22,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788827374] [2022-11-03 03:29:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:22,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:22,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:22,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629304388] [2022-11-03 03:29:22,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:22,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:22,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:22,883 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:22,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:29:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:26,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 10028 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:29:26,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18531 backedges. 1775 proven. 0 refuted. 0 times theorem prover too weak. 16756 trivial. 0 not checked. [2022-11-03 03:29:26,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:26,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:26,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788827374] [2022-11-03 03:29:26,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:26,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629304388] [2022-11-03 03:29:26,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629304388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:26,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:26,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:29:26,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936074166] [2022-11-03 03:29:26,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:26,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:26,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:26,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:26,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:26,380 INFO L87 Difference]: Start difference. First operand 8254 states and 12519 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (81), 3 states have call predecessors, (81), 3 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) [2022-11-03 03:29:28,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:33,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:36,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:29:38,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:41,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:29:43,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:48,197 INFO L93 Difference]: Finished difference Result 21068 states and 31871 transitions. [2022-11-03 03:29:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:48,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (81), 3 states have call predecessors, (81), 3 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) Word has length 904 [2022-11-03 03:29:48,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:48,285 INFO L225 Difference]: With dead ends: 21068 [2022-11-03 03:29:48,285 INFO L226 Difference]: Without dead ends: 12951 [2022-11-03 03:29:48,324 INFO L412 NwaCegarLoop]: 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 [2022-11-03 03:29:48,325 INFO L413 NwaCegarLoop]: 2947 mSDtfsCounter, 1919 mSDsluCounter, 2775 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 14 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1927 SdHoareTripleChecker+Valid, 5405 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:48,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1927 Valid, 5405 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 699 Invalid, 5 Unknown, 0 Unchecked, 21.3s Time] [2022-11-03 03:29:48,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12951 states. [2022-11-03 03:29:48,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12951 to 12932. [2022-11-03 03:29:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12932 states, 9269 states have (on average 1.4508576977020176) internal successors, (13448), 9402 states have internal predecessors, (13448), 2986 states have call successors, (2986), 677 states have call predecessors, (2986), 676 states have return successors, (3083), 2961 states have call predecessors, (3083), 2985 states have call successors, (3083) [2022-11-03 03:29:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12932 states to 12932 states and 19517 transitions. [2022-11-03 03:29:48,947 INFO L78 Accepts]: Start accepts. Automaton has 12932 states and 19517 transitions. Word has length 904 [2022-11-03 03:29:48,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:48,949 INFO L495 AbstractCegarLoop]: Abstraction has 12932 states and 19517 transitions. [2022-11-03 03:29:48,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (81), 3 states have call predecessors, (81), 3 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) [2022-11-03 03:29:48,949 INFO L276 IsEmpty]: Start isEmpty. Operand 12932 states and 19517 transitions. [2022-11-03 03:29:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 933 [2022-11-03 03:29:48,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:48,982 INFO L195 NwaCegarLoop]: 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] [2022-11-03 03:29:49,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:49,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:49,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:49,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:49,220 INFO L85 PathProgramCache]: Analyzing trace with hash -17477289, now seen corresponding path program 1 times [2022-11-03 03:29:49,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:49,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72664308] [2022-11-03 03:29:49,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:49,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18541 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 18522 trivial. 0 not checked. [2022-11-03 03:29:51,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:51,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72664308] [2022-11-03 03:29:51,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72664308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:51,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:51,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:51,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218691136] [2022-11-03 03:29:51,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:51,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:51,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:51,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:51,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:51,085 INFO L87 Difference]: Start difference. First operand 12932 states and 19517 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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) [2022-11-03 03:29:53,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:56,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:59,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:01,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:05,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:07,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:09,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:30:11,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:30:13,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:30:15,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:19,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:30:20,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:22,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:24,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:26,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:31,459 INFO L93 Difference]: Finished difference Result 25765 states and 38887 transitions. [2022-11-03 03:30:31,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:30:31,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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 [2022-11-03 03:30:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:31,531 INFO L225 Difference]: With dead ends: 25765 [2022-11-03 03:30:31,531 INFO L226 Difference]: Without dead ends: 12954 [2022-11-03 03:30:31,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:31,592 INFO L413 NwaCegarLoop]: 2626 mSDtfsCounter, 14 mSDsluCounter, 5916 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 5 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7874 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:31,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 7874 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1009 Invalid, 9 Unknown, 0 Unchecked, 40.0s Time] [2022-11-03 03:30:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12954 states. [2022-11-03 03:30:32,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12954 to 12597. [2022-11-03 03:30:32,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12597 states, 9082 states have (on average 1.4512221977537987) internal successors, (13180), 9179 states have internal predecessors, (13180), 2878 states have call successors, (2878), 637 states have call predecessors, (2878), 636 states have return successors, (2975), 2857 states have call predecessors, (2975), 2877 states have call successors, (2975) [2022-11-03 03:30:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12597 states to 12597 states and 19033 transitions. [2022-11-03 03:30:32,184 INFO L78 Accepts]: Start accepts. Automaton has 12597 states and 19033 transitions. Word has length 932 [2022-11-03 03:30:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:32,186 INFO L495 AbstractCegarLoop]: Abstraction has 12597 states and 19033 transitions. [2022-11-03 03:30:32,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 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) [2022-11-03 03:30:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 12597 states and 19033 transitions. [2022-11-03 03:30:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 938 [2022-11-03 03:30:32,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:32,216 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:32,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:30:32,216 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:32,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1719987773, now seen corresponding path program 1 times [2022-11-03 03:30:32,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:32,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851919405] [2022-11-03 03:30:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:32,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18541 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18521 trivial. 0 not checked. [2022-11-03 03:30:33,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:33,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851919405] [2022-11-03 03:30:33,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851919405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:33,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:33,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:30:33,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962057861] [2022-11-03 03:30:33,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:33,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:33,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:33,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:33,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:33,749 INFO L87 Difference]: Start difference. First operand 12597 states and 19033 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2022-11-03 03:30:35,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:39,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:42,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:44,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:30:46,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:50,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:30:52,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:55,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:57,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:57,747 INFO L93 Difference]: Finished difference Result 18870 states and 28512 transitions. [2022-11-03 03:30:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:57,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) Word has length 937 [2022-11-03 03:30:57,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:57,829 INFO L225 Difference]: With dead ends: 18870 [2022-11-03 03:30:57,830 INFO L226 Difference]: Without dead ends: 12599 [2022-11-03 03:30:57,857 INFO L412 NwaCegarLoop]: 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 [2022-11-03 03:30:57,858 INFO L413 NwaCegarLoop]: 2629 mSDtfsCounter, 0 mSDsluCounter, 2954 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 2 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5256 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:57,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5256 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 662 Invalid, 8 Unknown, 0 Unchecked, 23.7s Time] [2022-11-03 03:30:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12599 states. [2022-11-03 03:30:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12599 to 12599. [2022-11-03 03:30:58,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12599 states, 9084 states have (on average 1.45112285336856) internal successors, (13182), 9181 states have internal predecessors, (13182), 2878 states have call successors, (2878), 637 states have call predecessors, (2878), 636 states have return successors, (2975), 2857 states have call predecessors, (2975), 2877 states have call successors, (2975) [2022-11-03 03:30:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12599 states to 12599 states and 19035 transitions. [2022-11-03 03:30:58,575 INFO L78 Accepts]: Start accepts. Automaton has 12599 states and 19035 transitions. Word has length 937 [2022-11-03 03:30:58,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:58,577 INFO L495 AbstractCegarLoop]: Abstraction has 12599 states and 19035 transitions. [2022-11-03 03:30:58,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2022-11-03 03:30:58,577 INFO L276 IsEmpty]: Start isEmpty. Operand 12599 states and 19035 transitions. [2022-11-03 03:30:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2022-11-03 03:30:58,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:58,606 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:58,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:30:58,606 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:58,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1653128006, now seen corresponding path program 1 times [2022-11-03 03:30:58,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:58,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238693240] [2022-11-03 03:30:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:58,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18543 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 18522 trivial. 0 not checked. [2022-11-03 03:31:00,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:00,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238693240] [2022-11-03 03:31:00,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238693240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:00,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108437620] [2022-11-03 03:31:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:00,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:00,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:00,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:00,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:31:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:03,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 10548 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:31:03,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18543 backedges. 1760 proven. 0 refuted. 0 times theorem prover too weak. 16783 trivial. 0 not checked. [2022-11-03 03:31:04,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:04,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108437620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:04,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:31:04,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-03 03:31:04,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593424217] [2022-11-03 03:31:04,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:04,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:31:04,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:04,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:31:04,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:31:04,243 INFO L87 Difference]: Start difference. First operand 12599 states and 19035 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (90), 3 states have call predecessors, (90), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2022-11-03 03:31:06,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:08,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:11,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:14,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:16,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:31:19,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:31:20,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:22,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:28,778 INFO L93 Difference]: Finished difference Result 36948 states and 56050 transitions. [2022-11-03 03:31:28,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:31:28,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (90), 3 states have call predecessors, (90), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) Word has length 939 [2022-11-03 03:31:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:29,125 INFO L225 Difference]: With dead ends: 36948 [2022-11-03 03:31:29,125 INFO L226 Difference]: Without dead ends: 24297 [2022-11-03 03:31:29,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 942 GetRequests, 939 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:31:29,169 INFO L413 NwaCegarLoop]: 3366 mSDtfsCounter, 2518 mSDsluCounter, 2925 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2546 SdHoareTripleChecker+Valid, 5964 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:29,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2546 Valid, 5964 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 723 Invalid, 7 Unknown, 0 Unchecked, 23.9s Time] [2022-11-03 03:31:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24297 states. [2022-11-03 03:31:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24297 to 24260. [2022-11-03 03:31:30,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24260 states, 17564 states have (on average 1.4549077658847642) internal successors, (25554), 17745 states have internal predecessors, (25554), 5472 states have call successors, (5472), 1224 states have call predecessors, (5472), 1223 states have return successors, (5827), 5428 states have call predecessors, (5827), 5471 states have call successors, (5827) [2022-11-03 03:31:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24260 states to 24260 states and 36853 transitions. [2022-11-03 03:31:30,447 INFO L78 Accepts]: Start accepts. Automaton has 24260 states and 36853 transitions. Word has length 939 [2022-11-03 03:31:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:30,448 INFO L495 AbstractCegarLoop]: Abstraction has 24260 states and 36853 transitions. [2022-11-03 03:31:30,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (90), 3 states have call predecessors, (90), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2022-11-03 03:31:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 24260 states and 36853 transitions. [2022-11-03 03:31:30,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2022-11-03 03:31:30,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:30,480 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-03 03:31:30,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:30,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:30,699 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:30,699 INFO L85 PathProgramCache]: Analyzing trace with hash 778357443, now seen corresponding path program 1 times [2022-11-03 03:31:30,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:30,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925598065] [2022-11-03 03:31:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18551 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 18536 trivial. 0 not checked. [2022-11-03 03:31:32,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:32,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925598065] [2022-11-03 03:31:32,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925598065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:32,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897408601] [2022-11-03 03:31:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:32,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:32,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:32,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:32,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:31:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:35,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 10610 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:31:35,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18551 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18551 trivial. 0 not checked. [2022-11-03 03:31:38,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:38,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897408601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:38,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:31:38,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 03:31:38,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197363829] [2022-11-03 03:31:38,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:38,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:31:38,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:38,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:31:38,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:31:38,331 INFO L87 Difference]: Start difference. First operand 24260 states and 36853 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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) [2022-11-03 03:31:40,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:42,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:45,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:47,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:49,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:31:51,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:31:54,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:56,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:02,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:32:03,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:03,145 INFO L93 Difference]: Finished difference Result 36391 states and 55346 transitions. [2022-11-03 03:32:03,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:03,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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 957 [2022-11-03 03:32:03,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:03,312 INFO L225 Difference]: With dead ends: 36391 [2022-11-03 03:32:03,312 INFO L226 Difference]: Without dead ends: 36172 [2022-11-03 03:32:03,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 957 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:32:03,328 INFO L413 NwaCegarLoop]: 3093 mSDtfsCounter, 2531 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2545 SdHoareTripleChecker+Valid, 5521 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:03,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2545 Valid, 5521 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 676 Invalid, 6 Unknown, 0 Unchecked, 24.0s Time] [2022-11-03 03:32:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36172 states. [2022-11-03 03:32:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36172 to 35826. [2022-11-03 03:32:04,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35826 states, 25951 states have (on average 1.455589379985357) internal successors, (37774), 26214 states have internal predecessors, (37774), 8063 states have call successors, (8063), 1809 states have call predecessors, (8063), 1811 states have return successors, (8677), 8001 states have call predecessors, (8677), 8062 states have call successors, (8677) [2022-11-03 03:32:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35826 states to 35826 states and 54514 transitions. [2022-11-03 03:32:05,098 INFO L78 Accepts]: Start accepts. Automaton has 35826 states and 54514 transitions. Word has length 957 [2022-11-03 03:32:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:05,099 INFO L495 AbstractCegarLoop]: Abstraction has 35826 states and 54514 transitions. [2022-11-03 03:32:05,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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) [2022-11-03 03:32:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 35826 states and 54514 transitions. [2022-11-03 03:32:05,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2022-11-03 03:32:05,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:05,163 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-03 03:32:05,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:05,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 03:32:05,391 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:05,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1238479678, now seen corresponding path program 1 times [2022-11-03 03:32:05,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:05,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379372352] [2022-11-03 03:32:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:05,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:06,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:32:06,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284163071] [2022-11-03 03:32:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:06,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:06,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:06,173 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:06,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:32:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:09,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 10434 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:32:09,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18575 backedges. 1775 proven. 0 refuted. 0 times theorem prover too weak. 16800 trivial. 0 not checked. [2022-11-03 03:32:10,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:10,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:10,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379372352] [2022-11-03 03:32:10,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:32:10,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284163071] [2022-11-03 03:32:10,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284163071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:10,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:10,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:10,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670372390] [2022-11-03 03:32:10,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:10,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:10,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:10,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:10,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:10,045 INFO L87 Difference]: Start difference. First operand 35826 states and 54514 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 3 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2022-11-03 03:32:11,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:12,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:16,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:18,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:20,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:32:24,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:32:26,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:29,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:32,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:35,632 INFO L93 Difference]: Finished difference Result 66676 states and 101508 transitions. [2022-11-03 03:32:35,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:35,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 3 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) Word has length 975 [2022-11-03 03:32:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:36,050 INFO L225 Difference]: With dead ends: 66676 [2022-11-03 03:32:36,050 INFO L226 Difference]: Without dead ends: 54447 [2022-11-03 03:32:36,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 973 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:36,110 INFO L413 NwaCegarLoop]: 3293 mSDtfsCounter, 2475 mSDsluCounter, 2926 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2489 SdHoareTripleChecker+Valid, 5891 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:36,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2489 Valid, 5891 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 706 Invalid, 6 Unknown, 0 Unchecked, 24.4s Time] [2022-11-03 03:32:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54447 states. [2022-11-03 03:32:38,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54447 to 53024. [2022-11-03 03:32:38,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53024 states, 38352 states have (on average 1.455491239048811) internal successors, (55821), 38738 states have internal predecessors, (55821), 11958 states have call successors, (11958), 2707 states have call predecessors, (11958), 2713 states have return successors, (13063), 11859 states have call predecessors, (13063), 11957 states have call successors, (13063) [2022-11-03 03:32:38,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53024 states to 53024 states and 80842 transitions. [2022-11-03 03:32:38,879 INFO L78 Accepts]: Start accepts. Automaton has 53024 states and 80842 transitions. Word has length 975 [2022-11-03 03:32:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:38,880 INFO L495 AbstractCegarLoop]: Abstraction has 53024 states and 80842 transitions. [2022-11-03 03:32:38,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 3 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2022-11-03 03:32:38,880 INFO L276 IsEmpty]: Start isEmpty. Operand 53024 states and 80842 transitions. [2022-11-03 03:32:39,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 994 [2022-11-03 03:32:39,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:39,186 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-03 03:32:39,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:39,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:39,387 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:39,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash -491817665, now seen corresponding path program 1 times [2022-11-03 03:32:39,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:39,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009032404] [2022-11-03 03:32:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:39,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:39,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:32:39,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204976276] [2022-11-03 03:32:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:39,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:39,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:39,925 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:39,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:32:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:43,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 10496 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:32:43,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18583 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18583 trivial. 0 not checked. [2022-11-03 03:32:46,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:46,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:46,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009032404] [2022-11-03 03:32:46,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:32:46,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204976276] [2022-11-03 03:32:46,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204976276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:46,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:46,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:32:46,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665552245] [2022-11-03 03:32:46,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:46,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:46,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:46,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:46,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:46,177 INFO L87 Difference]: Start difference. First operand 53024 states and 80842 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2022-11-03 03:32:48,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:52,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:54,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:56,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:59,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:33:03,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:33:05,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:08,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:10,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:14,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:14,260 INFO L93 Difference]: Finished difference Result 76691 states and 116982 transitions. [2022-11-03 03:33:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:33:14,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 993 [2022-11-03 03:33:14,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:14,787 INFO L225 Difference]: With dead ends: 76691 [2022-11-03 03:33:14,787 INFO L226 Difference]: Without dead ends: 76469 [2022-11-03 03:33:14,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 991 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:33:14,810 INFO L413 NwaCegarLoop]: 3089 mSDtfsCounter, 2502 mSDsluCounter, 2760 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2516 SdHoareTripleChecker+Valid, 5517 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:14,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2516 Valid, 5517 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 676 Invalid, 6 Unknown, 0 Unchecked, 26.7s Time] [2022-11-03 03:33:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76469 states. [2022-11-03 03:33:17,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76469 to 75790. [2022-11-03 03:33:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75790 states, 54829 states have (on average 1.4557806999945284) internal successors, (79819), 55381 states have internal predecessors, (79819), 17101 states have call successors, (17101), 3853 states have call predecessors, (17101), 3859 states have return successors, (18722), 16956 states have call predecessors, (18722), 17100 states have call successors, (18722) [2022-11-03 03:33:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75790 states to 75790 states and 115642 transitions. [2022-11-03 03:33:17,871 INFO L78 Accepts]: Start accepts. Automaton has 75790 states and 115642 transitions. Word has length 993 [2022-11-03 03:33:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:17,872 INFO L495 AbstractCegarLoop]: Abstraction has 75790 states and 115642 transitions. [2022-11-03 03:33:17,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2022-11-03 03:33:17,873 INFO L276 IsEmpty]: Start isEmpty. Operand 75790 states and 115642 transitions. [2022-11-03 03:33:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2022-11-03 03:33:17,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:17,934 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:17,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:18,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:18,151 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:18,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1549400572, now seen corresponding path program 1 times [2022-11-03 03:33:18,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:18,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549725670] [2022-11-03 03:33:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:18,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:18,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:33:18,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262374232] [2022-11-03 03:33:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:18,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:18,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:18,767 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:18,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:33:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:22,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 11335 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:33:22,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18564 backedges. 1781 proven. 0 refuted. 0 times theorem prover too weak. 16783 trivial. 0 not checked. [2022-11-03 03:33:23,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:23,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:23,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549725670] [2022-11-03 03:33:23,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:33:23,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262374232] [2022-11-03 03:33:23,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262374232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:23,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:23,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:33:23,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842585919] [2022-11-03 03:33:23,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:23,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:33:23,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:23,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:33:23,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:33:23,126 INFO L87 Difference]: Start difference. First operand 75790 states and 115642 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 3 states have call successors, (96), 3 states have call predecessors, (96), 3 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-03 03:33:25,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:26,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:31,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:33,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:35,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:33:38,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:33:40,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:46,052 INFO L93 Difference]: Finished difference Result 108132 states and 164886 transitions. [2022-11-03 03:33:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:33:46,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 3 states have call successors, (96), 3 states have call predecessors, (96), 3 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) Word has length 1000 [2022-11-03 03:33:46,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:46,469 INFO L225 Difference]: With dead ends: 108132 [2022-11-03 03:33:46,470 INFO L226 Difference]: Without dead ends: 78736 [2022-11-03 03:33:46,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 999 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:33:46,556 INFO L413 NwaCegarLoop]: 2925 mSDtfsCounter, 1945 mSDsluCounter, 2774 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 14 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1953 SdHoareTripleChecker+Valid, 5382 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:46,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1953 Valid, 5382 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 689 Invalid, 5 Unknown, 0 Unchecked, 21.2s Time] [2022-11-03 03:33:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78736 states. [2022-11-03 03:33:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78736 to 78459. [2022-11-03 03:33:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78459 states, 56807 states have (on average 1.4557184853979264) internal successors, (82695), 57383 states have internal predecessors, (82695), 17631 states have call successors, (17631), 4014 states have call predecessors, (17631), 4020 states have return successors, (19382), 17478 states have call predecessors, (19382), 17630 states have call successors, (19382) [2022-11-03 03:33:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78459 states to 78459 states and 119708 transitions. [2022-11-03 03:33:49,424 INFO L78 Accepts]: Start accepts. Automaton has 78459 states and 119708 transitions. Word has length 1000 [2022-11-03 03:33:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:49,426 INFO L495 AbstractCegarLoop]: Abstraction has 78459 states and 119708 transitions. [2022-11-03 03:33:49,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 3 states have call successors, (96), 3 states have call predecessors, (96), 3 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-03 03:33:49,426 INFO L276 IsEmpty]: Start isEmpty. Operand 78459 states and 119708 transitions. [2022-11-03 03:33:49,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2022-11-03 03:33:49,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:49,792 INFO L195 NwaCegarLoop]: 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, 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, 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] [2022-11-03 03:33:49,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:50,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:50,007 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:50,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1357966012, now seen corresponding path program 1 times [2022-11-03 03:33:50,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:50,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658611317] [2022-11-03 03:33:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:50,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:50,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:33:50,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835819285] [2022-11-03 03:33:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:50,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:50,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:50,426 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:50,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:33:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:54,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 11708 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:33:54,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18627 backedges. 1778 proven. 0 refuted. 0 times theorem prover too weak. 16849 trivial. 0 not checked. [2022-11-03 03:33:55,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:55,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:55,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658611317] [2022-11-03 03:33:55,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:33:55,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835819285] [2022-11-03 03:33:55,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835819285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:55,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:55,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:33:55,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972942856] [2022-11-03 03:33:55,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:55,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:33:55,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:55,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:33:55,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:33:55,112 INFO L87 Difference]: Start difference. First operand 78459 states and 119708 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2022-11-03 03:33:57,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:34:01,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:34:04,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:34:06,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:34:08,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:34:14,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:34:16,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:34:18,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:34:22,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:22,106 INFO L93 Difference]: Finished difference Result 170067 states and 259286 transitions. [2022-11-03 03:34:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:22,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) Word has length 1066 [2022-11-03 03:34:22,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:22,547 INFO L225 Difference]: With dead ends: 170067 [2022-11-03 03:34:22,547 INFO L226 Difference]: Without dead ends: 104081 [2022-11-03 03:34:22,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1065 GetRequests, 1064 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:22,728 INFO L413 NwaCegarLoop]: 3330 mSDtfsCounter, 2510 mSDsluCounter, 2928 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2510 SdHoareTripleChecker+Valid, 5928 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:22,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2510 Valid, 5928 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 706 Invalid, 6 Unknown, 0 Unchecked, 24.4s Time] [2022-11-03 03:34:22,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104081 states. [2022-11-03 03:34:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104081 to 102673. [2022-11-03 03:34:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102673 states, 74352 states have (on average 1.4554954809554552) internal successors, (108219), 75089 states have internal predecessors, (108219), 23084 states have call successors, (23084), 5230 states have call predecessors, (23084), 5236 states have return successors, (25179), 22894 states have call predecessors, (25179), 23083 states have call successors, (25179) [2022-11-03 03:34:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102673 states to 102673 states and 156482 transitions. [2022-11-03 03:34:26,637 INFO L78 Accepts]: Start accepts. Automaton has 102673 states and 156482 transitions. Word has length 1066 [2022-11-03 03:34:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:26,638 INFO L495 AbstractCegarLoop]: Abstraction has 102673 states and 156482 transitions. [2022-11-03 03:34:26,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2022-11-03 03:34:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 102673 states and 156482 transitions. [2022-11-03 03:34:26,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1085 [2022-11-03 03:34:26,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:26,760 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-03 03:34:26,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:26,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 03:34:26,974 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:26,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1732790457, now seen corresponding path program 1 times [2022-11-03 03:34:26,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:26,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967888558] [2022-11-03 03:34:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:26,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:27,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:34:27,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346134286] [2022-11-03 03:34:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:27,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:27,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:27,695 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:27,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:34:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:31,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 11770 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:34:31,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18635 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18635 trivial. 0 not checked. [2022-11-03 03:34:34,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:34:34,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:34,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967888558] [2022-11-03 03:34:34,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:34:34,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346134286] [2022-11-03 03:34:34,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346134286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:34,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:34,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:34:34,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832773268] [2022-11-03 03:34:34,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:34,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:34:34,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:34,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:34:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:34,201 INFO L87 Difference]: Start difference. First operand 102673 states and 156482 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 2 states have call successors, (110), 2 states have call predecessors, (110), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2022-11-03 03:34:36,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:34:40,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:34:43,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:34:46,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:34:49,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:34:58,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:58,335 INFO L93 Difference]: Finished difference Result 170284 states and 259685 transitions. [2022-11-03 03:34:58,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:34:58,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 2 states have call successors, (110), 2 states have call predecessors, (110), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 1084 [2022-11-03 03:34:58,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:59,060 INFO L225 Difference]: With dead ends: 170284 [2022-11-03 03:34:59,060 INFO L226 Difference]: Without dead ends: 170062 [2022-11-03 03:34:59,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 1082 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:34:59,125 INFO L413 NwaCegarLoop]: 3076 mSDtfsCounter, 2528 mSDsluCounter, 2759 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2542 SdHoareTripleChecker+Valid, 5504 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:59,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2542 Valid, 5504 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 665 Invalid, 5 Unknown, 0 Unchecked, 20.7s Time] [2022-11-03 03:34:59,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170062 states. [2022-11-03 03:35:04,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170062 to 168994. [2022-11-03 03:35:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168994 states, 122361 states have (on average 1.455275782316261) internal successors, (178069), 123577 states have internal predecessors, (178069), 37999 states have call successors, (37999), 8630 states have call predecessors, (37999), 8633 states have return successors, (41572), 37672 states have call predecessors, (41572), 37998 states have call successors, (41572) [2022-11-03 03:35:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168994 states to 168994 states and 257640 transitions. [2022-11-03 03:35:05,953 INFO L78 Accepts]: Start accepts. Automaton has 168994 states and 257640 transitions. Word has length 1084 [2022-11-03 03:35:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:05,954 INFO L495 AbstractCegarLoop]: Abstraction has 168994 states and 257640 transitions. [2022-11-03 03:35:05,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 2 states have call successors, (110), 2 states have call predecessors, (110), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2022-11-03 03:35:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 168994 states and 257640 transitions. [2022-11-03 03:35:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1099 [2022-11-03 03:35:06,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:06,157 INFO L195 NwaCegarLoop]: 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, 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, 1, 1, 1] [2022-11-03 03:35:06,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:06,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c879989-c5cc-4f05-a3ec-9e8e9ab304c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 03:35:06,358 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:06,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:06,359 INFO L85 PathProgramCache]: Analyzing trace with hash 832625471, now seen corresponding path program 1 times [2022-11-03 03:35:06,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:06,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281346170] [2022-11-03 03:35:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:06,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18635 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 18597 trivial. 0 not checked. [2022-11-03 03:35:08,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:08,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281346170] [2022-11-03 03:35:08,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281346170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:08,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:35:08,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:35:08,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399138662] [2022-11-03 03:35:08,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:08,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:35:08,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:08,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:35:08,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:35:08,416 INFO L87 Difference]: Start difference. First operand 168994 states and 257640 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 2 states have call successors, (110), 2 states have call predecessors, (110), 1 states have return successors, (109), 2 states have call predecessors, (109), 2 states have call successors, (109) [2022-11-03 03:35:10,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:35:13,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:35:16,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:35:19,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:35:21,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:35:23,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:35:25,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:35:27,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:35:29,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:35:36,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:36,923 INFO L93 Difference]: Finished difference Result 337637 states and 514794 transitions. [2022-11-03 03:35:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:35:36,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 2 states have call successors, (110), 2 states have call predecessors, (110), 1 states have return successors, (109), 2 states have call predecessors, (109), 2 states have call successors, (109) Word has length 1098 [2022-11-03 03:35:36,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:37,720 INFO L225 Difference]: With dead ends: 337637 [2022-11-03 03:35:37,720 INFO L226 Difference]: Without dead ends: 169050 [2022-11-03 03:35:38,458 INFO L412 NwaCegarLoop]: 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 [2022-11-03 03:35:38,458 INFO L413 NwaCegarLoop]: 2629 mSDtfsCounter, 0 mSDsluCounter, 2960 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5256 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:38,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5256 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 667 Invalid, 6 Unknown, 0 Unchecked, 23.6s Time] [2022-11-03 03:35:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169050 states. [2022-11-03 03:35:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169050 to 169050. [2022-11-03 03:35:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169050 states, 122417 states have (on average 1.4550675151327022) internal successors, (178125), 123633 states have internal predecessors, (178125), 37999 states have call successors, (37999), 8630 states have call predecessors, (37999), 8633 states have return successors, (41572), 37672 states have call predecessors, (41572), 37998 states have call successors, (41572)