./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-32_7a-drivers--md--dm-crypt.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_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/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_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-crypt.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/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_4234159f-d194-4913-b3d9-0a8700f4b0be/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 e3850823f794942e659fe5d5668a6f06f215c2bd60f5331d1dc740a47ba42c06 --- 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 02:43:29,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:43:29,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:43:29,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:43:29,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:43:29,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:43:29,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:43:29,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:43:29,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:43:29,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:43:29,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:43:29,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:43:29,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:43:29,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:43:29,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:43:29,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:43:30,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:43:30,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:43:30,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:43:30,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:43:30,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:43:30,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:43:30,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:43:30,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:43:30,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:43:30,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:43:30,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:43:30,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:43:30,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:43:30,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:43:30,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:43:30,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:43:30,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:43:30,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:43:30,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:43:30,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:43:30,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:43:30,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:43:30,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:43:30,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:43:30,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:43:30,039 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:43:30,075 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:43:30,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:43:30,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:43:30,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:43:30,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:43:30,087 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:43:30,088 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:43:30,088 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:43:30,088 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:43:30,088 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:43:30,090 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:43:30,090 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:43:30,090 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:43:30,091 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:43:30,091 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:43:30,091 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:43:30,091 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:43:30,092 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:43:30,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:43:30,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:43:30,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:43:30,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:43:30,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:43:30,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:43:30,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:43:30,101 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:43:30,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:43:30,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:43:30,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:43:30,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:43:30,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:43:30,103 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:43:30,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:43:30,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:43:30,105 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:43:30,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:43:30,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:43:30,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:43:30,106 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_4234159f-d194-4913-b3d9-0a8700f4b0be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3850823f794942e659fe5d5668a6f06f215c2bd60f5331d1dc740a47ba42c06 [2022-11-03 02:43:30,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:43:30,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:43:30,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:43:30,387 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:43:30,388 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:43:30,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-crypt.ko-entry_point.cil.out.i [2022-11-03 02:43:30,477 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/data/8462631b7/e70ac22f5f3043a6b8ce4e095b3a9bd8/FLAG7b5a4b29a [2022-11-03 02:43:31,354 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:43:31,355 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-crypt.ko-entry_point.cil.out.i [2022-11-03 02:43:31,398 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/data/8462631b7/e70ac22f5f3043a6b8ce4e095b3a9bd8/FLAG7b5a4b29a [2022-11-03 02:43:31,805 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/data/8462631b7/e70ac22f5f3043a6b8ce4e095b3a9bd8 [2022-11-03 02:43:31,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:43:31,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:43:31,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:43:31,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:43:31,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:43:31,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:43:31" (1/1) ... [2022-11-03 02:43:31,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@91efafc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:31, skipping insertion in model container [2022-11-03 02:43:31,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:43:31" (1/1) ... [2022-11-03 02:43:31,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:43:31,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:43:34,450 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_4234159f-d194-4913-b3d9-0a8700f4b0be/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-crypt.ko-entry_point.cil.out.i[274856,274869] [2022-11-03 02:43:34,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:43:34,636 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:43:35,153 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_4234159f-d194-4913-b3d9-0a8700f4b0be/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-crypt.ko-entry_point.cil.out.i[274856,274869] [2022-11-03 02:43:35,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:43:35,375 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:43:35,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35 WrapperNode [2022-11-03 02:43:35,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:43:35,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:43:35,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:43:35,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:43:35,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,772 INFO L138 Inliner]: procedures = 398, calls = 2089, calls flagged for inlining = 144, calls inlined = 137, statements flattened = 5379 [2022-11-03 02:43:35,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:43:35,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:43:35,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:43:35,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:43:35,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:36,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:36,063 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:36,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:36,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:43:36,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:43:36,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:43:36,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:43:36,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:36,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:43:36,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:36,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:43:36,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:43:36,207 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-03 02:43:36,208 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-03 02:43:36,208 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-03 02:43:36,208 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_cipher_crt [2022-11-03 02:43:36,208 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_cipher_crt [2022-11-03 02:43:36,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 02:43:36,209 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 02:43:36,209 INFO L130 BoogieDeclarations]: Found specification of procedure kcryptd_crypt [2022-11-03 02:43:36,209 INFO L138 BoogieDeclarations]: Found implementation of procedure kcryptd_crypt [2022-11-03 02:43:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_essiv_dtr [2022-11-03 02:43:36,251 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_essiv_dtr [2022-11-03 02:43:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:43:36,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:43:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_map [2022-11-03 02:43:36,251 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_map [2022-11-03 02:43:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_shash_tfm [2022-11-03 02:43:36,251 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_shash_tfm [2022-11-03 02:43:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure mempool_free [2022-11-03 02:43:36,252 INFO L138 BoogieDeclarations]: Found implementation of procedure mempool_free [2022-11-03 02:43:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_message [2022-11-03 02:43:36,252 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_message [2022-11-03 02:43:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure kcryptd_crypt_write_io_submit [2022-11-03 02:43:36,252 INFO L138 BoogieDeclarations]: Found implementation of procedure kcryptd_crypt_write_io_submit [2022-11-03 02:43:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2022-11-03 02:43:36,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2022-11-03 02:43:36,253 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_2 [2022-11-03 02:43:36,253 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_2 [2022-11-03 02:43:36,253 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_dec_pending [2022-11-03 02:43:36,253 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_dec_pending [2022-11-03 02:43:36,253 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-03 02:43:36,253 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-03 02:43:36,253 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_essiv_ctr [2022-11-03 02:43:36,254 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_essiv_ctr [2022-11-03 02:43:36,254 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_lmk_init [2022-11-03 02:43:36,254 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_lmk_init [2022-11-03 02:43:36,254 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_ablkcipher_alignmask [2022-11-03 02:43:36,254 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_ablkcipher_alignmask [2022-11-03 02:43:36,254 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_inc_pending [2022-11-03 02:43:36,254 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_inc_pending [2022-11-03 02:43:36,255 INFO L130 BoogieDeclarations]: Found specification of procedure generic_make_request [2022-11-03 02:43:36,255 INFO L138 BoogieDeclarations]: Found implementation of procedure generic_make_request [2022-11-03 02:43:36,255 INFO L130 BoogieDeclarations]: Found specification of procedure mempool_create [2022-11-03 02:43:36,255 INFO L138 BoogieDeclarations]: Found implementation of procedure mempool_create [2022-11-03 02:43:36,255 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2022-11-03 02:43:36,255 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2022-11-03 02:43:36,255 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_free_tfms [2022-11-03 02:43:36,255 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_free_tfms [2022-11-03 02:43:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_dtr [2022-11-03 02:43:36,256 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_dtr [2022-11-03 02:43:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-03 02:43:36,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-03 02:43:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_hash_tfm [2022-11-03 02:43:36,256 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_hash_tfm [2022-11-03 02:43:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_postsuspend [2022-11-03 02:43:36,257 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_postsuspend [2022-11-03 02:43:36,257 INFO L130 BoogieDeclarations]: Found specification of procedure sg_init_table [2022-11-03 02:43:36,257 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_init_table [2022-11-03 02:43:36,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:43:36,257 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_shash_descsize [2022-11-03 02:43:36,257 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_shash_descsize [2022-11-03 02:43:36,257 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 02:43:36,257 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 02:43:36,258 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_shash_init [2022-11-03 02:43:36,258 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_shash_init [2022-11-03 02:43:36,258 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_set_key [2022-11-03 02:43:36,260 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_set_key [2022-11-03 02:43:36,260 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_unaligned_access_size [2022-11-03 02:43:36,260 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_lmk_post [2022-11-03 02:43:36,261 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_lmk_post [2022-11-03 02:43:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_alloc_shash [2022-11-03 02:43:36,261 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_alloc_shash [2022-11-03 02:43:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 02:43:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_tcw_gen [2022-11-03 02:43:36,262 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_tcw_gen [2022-11-03 02:43:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure kcryptd_io_read [2022-11-03 02:43:36,262 INFO L138 BoogieDeclarations]: Found implementation of procedure kcryptd_io_read [2022-11-03 02:43:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2022-11-03 02:43:36,263 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2022-11-03 02:43:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 02:43:36,264 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_ablkcipher_crt [2022-11-03 02:43:36,264 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_ablkcipher_crt [2022-11-03 02:43:36,265 INFO L130 BoogieDeclarations]: Found specification of procedure bio_advance_iter [2022-11-03 02:43:36,265 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_advance_iter [2022-11-03 02:43:36,265 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_cipher_setkey [2022-11-03 02:43:36,266 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_cipher_setkey [2022-11-03 02:43:36,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:43:36,266 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_free_shash [2022-11-03 02:43:36,267 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_free_shash [2022-11-03 02:43:36,267 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_lmk_one [2022-11-03 02:43:36,267 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_lmk_one [2022-11-03 02:43:36,268 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_ablkcipher_reqtfm [2022-11-03 02:43:36,268 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_ablkcipher_reqtfm [2022-11-03 02:43:36,269 INFO L130 BoogieDeclarations]: Found specification of procedure kzfree [2022-11-03 02:43:36,269 INFO L138 BoogieDeclarations]: Found implementation of procedure kzfree [2022-11-03 02:43:36,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 02:43:36,269 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 02:43:36,270 INFO L130 BoogieDeclarations]: Found specification of procedure kstrdup [2022-11-03 02:43:36,270 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrdup [2022-11-03 02:43:36,270 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_tcw_post [2022-11-03 02:43:36,270 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_tcw_post [2022-11-03 02:43:36,270 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_alloc_base [2022-11-03 02:43:36,271 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_alloc_base [2022-11-03 02:43:36,271 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 02:43:36,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 02:43:36,272 INFO L130 BoogieDeclarations]: Found specification of procedure kcryptd_crypt_read_done [2022-11-03 02:43:36,272 INFO L138 BoogieDeclarations]: Found implementation of procedure kcryptd_crypt_read_done [2022-11-03 02:43:36,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:43:36,272 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_bio_alloc_lock_of_crypt_config [2022-11-03 02:43:36,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_bio_alloc_lock_of_crypt_config [2022-11-03 02:43:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:43:36,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:43:36,277 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_benbi_gen [2022-11-03 02:43:36,278 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_benbi_gen [2022-11-03 02:43:36,278 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-03 02:43:36,278 INFO L130 BoogieDeclarations]: Found specification of procedure mempool_alloc [2022-11-03 02:43:36,280 INFO L138 BoogieDeclarations]: Found implementation of procedure mempool_alloc [2022-11-03 02:43:36,280 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_status [2022-11-03 02:43:36,281 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_status [2022-11-03 02:43:36,281 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 02:43:36,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 02:43:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2022-11-03 02:43:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2022-11-03 02:43:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-03 02:43:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-03 02:43:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_convert_init [2022-11-03 02:43:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_convert_init [2022-11-03 02:43:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_convert [2022-11-03 02:43:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_convert [2022-11-03 02:43:36,289 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_bio_alloc_lock_of_crypt_config [2022-11-03 02:43:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_bio_alloc_lock_of_crypt_config [2022-11-03 02:43:36,289 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_tcw_whitening [2022-11-03 02:43:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_tcw_whitening [2022-11-03 02:43:36,290 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_essiv_gen [2022-11-03 02:43:36,290 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_essiv_gen [2022-11-03 02:43:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_cipher_tfm [2022-11-03 02:43:36,305 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_cipher_tfm [2022-11-03 02:43:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_tcw_init [2022-11-03 02:43:36,305 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_tcw_init [2022-11-03 02:43:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure kmap_atomic [2022-11-03 02:43:36,305 INFO L138 BoogieDeclarations]: Found implementation of procedure kmap_atomic [2022-11-03 02:43:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2022-11-03 02:43:36,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2022-11-03 02:43:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-11-03 02:43:36,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-11-03 02:43:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-03 02:43:36,307 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-03 02:43:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure kcryptd_io_read_work [2022-11-03 02:43:36,307 INFO L138 BoogieDeclarations]: Found implementation of procedure kcryptd_io_read_work [2022-11-03 02:43:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_lmk_gen [2022-11-03 02:43:36,307 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_lmk_gen [2022-11-03 02:43:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:43:36,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:43:36,308 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-03 02:43:36,308 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-03 02:43:36,308 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_null_gen [2022-11-03 02:43:36,308 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_null_gen [2022-11-03 02:43:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:43:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:43:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:43:36,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:43:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure dm_per_bio_data [2022-11-03 02:43:36,309 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_per_bio_data [2022-11-03 02:43:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iterate_devices [2022-11-03 02:43:36,310 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iterate_devices [2022-11-03 02:43:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure clone_init [2022-11-03 02:43:36,310 INFO L138 BoogieDeclarations]: Found implementation of procedure clone_init [2022-11-03 02:43:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-03 02:43:36,310 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-03 02:43:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2022-11-03 02:43:36,311 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2022-11-03 02:43:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_free_hash [2022-11-03 02:43:36,311 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_free_hash [2022-11-03 02:43:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 02:43:36,311 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 02:43:36,312 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_8 [2022-11-03 02:43:36,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_8 [2022-11-03 02:43:36,313 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_5 [2022-11-03 02:43:36,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_5 [2022-11-03 02:43:36,313 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:43:36,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:43:36,314 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_4 [2022-11-03 02:43:36,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_4 [2022-11-03 02:43:36,315 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2022-11-03 02:43:36,315 INFO L138 BoogieDeclarations]: Found implementation of procedure strsep [2022-11-03 02:43:36,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:43:36,315 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:43:36,315 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:43:36,316 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:43:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_tcw_ctr [2022-11-03 02:43:36,316 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_tcw_ctr [2022-11-03 02:43:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 02:43:36,316 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 02:43:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_essiv_wipe [2022-11-03 02:43:36,317 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_essiv_wipe [2022-11-03 02:43:36,317 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2022-11-03 02:43:36,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2022-11-03 02:43:36,317 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_preresume [2022-11-03 02:43:36,317 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_preresume [2022-11-03 02:43:36,317 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_lmk_dtr [2022-11-03 02:43:36,318 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_lmk_dtr [2022-11-03 02:43:36,318 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_merge [2022-11-03 02:43:36,318 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_merge [2022-11-03 02:43:36,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:43:36,318 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-03 02:43:36,318 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-03 02:43:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure mempool_destroy [2022-11-03 02:43:36,319 INFO L138 BoogieDeclarations]: Found implementation of procedure mempool_destroy [2022-11-03 02:43:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_xor [2022-11-03 02:43:36,319 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_xor [2022-11-03 02:43:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:43:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_ablkcipher_ivsize [2022-11-03 02:43:36,320 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_ablkcipher_ivsize [2022-11-03 02:43:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_shash_alg [2022-11-03 02:43:36,320 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_shash_alg [2022-11-03 02:43:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-03 02:43:36,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-03 02:43:36,321 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_2 [2022-11-03 02:43:36,321 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_2 [2022-11-03 02:43:36,321 INFO L130 BoogieDeclarations]: Found specification of procedure any_tfm [2022-11-03 02:43:36,321 INFO L138 BoogieDeclarations]: Found implementation of procedure any_tfm [2022-11-03 02:43:36,321 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_tcw_dtr [2022-11-03 02:43:36,321 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_tcw_dtr [2022-11-03 02:43:36,322 INFO L130 BoogieDeclarations]: Found specification of procedure kcryptd_queue_crypt [2022-11-03 02:43:36,322 INFO L138 BoogieDeclarations]: Found implementation of procedure kcryptd_queue_crypt [2022-11-03 02:43:36,322 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_essiv_init [2022-11-03 02:43:36,322 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_essiv_init [2022-11-03 02:43:36,322 INFO L130 BoogieDeclarations]: Found specification of procedure bio_put [2022-11-03 02:43:36,322 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_put [2022-11-03 02:43:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_hash_digestsize [2022-11-03 02:43:36,323 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_hash_digestsize [2022-11-03 02:43:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_plain_gen [2022-11-03 02:43:36,323 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_plain_gen [2022-11-03 02:43:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:43:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_lmk_ctr [2022-11-03 02:43:36,324 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_lmk_ctr [2022-11-03 02:43:36,324 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_free_tfm [2022-11-03 02:43:36,324 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_free_tfm [2022-11-03 02:43:36,325 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-03 02:43:36,329 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-03 02:43:36,329 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2022-11-03 02:43:36,329 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2022-11-03 02:43:36,329 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_free_req [2022-11-03 02:43:36,329 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_free_req [2022-11-03 02:43:36,330 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_benbi_ctr [2022-11-03 02:43:36,330 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_benbi_ctr [2022-11-03 02:43:36,330 INFO L130 BoogieDeclarations]: Found specification of procedure iv_of_dmreq [2022-11-03 02:43:36,330 INFO L138 BoogieDeclarations]: Found implementation of procedure iv_of_dmreq [2022-11-03 02:43:36,331 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2022-11-03 02:43:36,333 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2022-11-03 02:43:36,333 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_tcw_wipe [2022-11-03 02:43:36,333 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_tcw_wipe [2022-11-03 02:43:36,334 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_free_buffer_pages [2022-11-03 02:43:36,334 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_free_buffer_pages [2022-11-03 02:43:36,334 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_hash_crt [2022-11-03 02:43:36,334 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_hash_crt [2022-11-03 02:43:36,334 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_lmk_wipe [2022-11-03 02:43:36,334 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_lmk_wipe [2022-11-03 02:43:36,334 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_benbi_dtr [2022-11-03 02:43:36,335 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_benbi_dtr [2022-11-03 02:43:36,335 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 02:43:36,335 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 02:43:36,335 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:43:36,335 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:43:36,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:43:36,336 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2022-11-03 02:43:36,336 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2022-11-03 02:43:36,336 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:43:36,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:43:36,336 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_setkey_allcpus [2022-11-03 02:43:36,336 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_setkey_allcpus [2022-11-03 02:43:36,337 INFO L130 BoogieDeclarations]: Found specification of procedure __ilog2_u32 [2022-11-03 02:43:36,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __ilog2_u32 [2022-11-03 02:43:36,337 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 02:43:36,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 02:43:36,337 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_iv_plain64_gen [2022-11-03 02:43:36,337 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_iv_plain64_gen [2022-11-03 02:43:36,338 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_free_cipher [2022-11-03 02:43:36,338 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_free_cipher [2022-11-03 02:43:36,338 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2022-11-03 02:43:36,338 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2022-11-03 02:43:36,338 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2022-11-03 02:43:36,338 INFO L138 BoogieDeclarations]: Found implementation of procedure strcasecmp [2022-11-03 02:43:36,338 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-03 02:43:36,339 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-03 02:43:36,339 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2022-11-03 02:43:36,339 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2022-11-03 02:43:36,339 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_2 [2022-11-03 02:43:36,339 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_2 [2022-11-03 02:43:36,339 INFO L130 BoogieDeclarations]: Found specification of procedure dmreq_of_req [2022-11-03 02:43:36,340 INFO L138 BoogieDeclarations]: Found implementation of procedure dmreq_of_req [2022-11-03 02:43:36,340 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_tfm_alg_blocksize [2022-11-03 02:43:36,340 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_tfm_alg_blocksize [2022-11-03 02:43:36,340 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_shash_update [2022-11-03 02:43:36,340 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_shash_update [2022-11-03 02:43:36,340 INFO L130 BoogieDeclarations]: Found specification of procedure sg_set_page [2022-11-03 02:43:36,341 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_set_page [2022-11-03 02:43:36,341 INFO L130 BoogieDeclarations]: Found specification of procedure __kunmap_atomic [2022-11-03 02:43:36,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __kunmap_atomic [2022-11-03 02:43:36,341 INFO L130 BoogieDeclarations]: Found specification of procedure crypto_ablkcipher_tfm [2022-11-03 02:43:36,341 INFO L138 BoogieDeclarations]: Found implementation of procedure crypto_ablkcipher_tfm [2022-11-03 02:43:36,341 INFO L130 BoogieDeclarations]: Found specification of procedure crypt_resume [2022-11-03 02:43:36,341 INFO L138 BoogieDeclarations]: Found implementation of procedure crypt_resume [2022-11-03 02:43:36,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:43:36,342 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2022-11-03 02:43:36,342 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2022-11-03 02:43:37,436 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:43:37,446 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:43:37,853 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:43:41,983 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:43:43,279 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:43:43,280 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:43:43,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:43 BoogieIcfgContainer [2022-11-03 02:43:43,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:43:43,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:43:43,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:43:43,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:43:43,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:43:31" (1/3) ... [2022-11-03 02:43:43,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587995db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:43:43, skipping insertion in model container [2022-11-03 02:43:43,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (2/3) ... [2022-11-03 02:43:43,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587995db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:43:43, skipping insertion in model container [2022-11-03 02:43:43,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:43" (3/3) ... [2022-11-03 02:43:43,296 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-crypt.ko-entry_point.cil.out.i [2022-11-03 02:43:43,317 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:43:43,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:43:43,401 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:43:43,409 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;@655773c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:43:43,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:43:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 1822 states, 1133 states have (on average 1.3583406884377758) internal successors, (1539), 1178 states have internal predecessors, (1539), 545 states have call successors, (545), 143 states have call predecessors, (545), 142 states have return successors, (533), 523 states have call predecessors, (533), 533 states have call successors, (533) [2022-11-03 02:43:43,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2022-11-03 02:43:43,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:43,466 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:43:43,466 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:43,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:43,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1746389763, now seen corresponding path program 1 times [2022-11-03 02:43:43,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:43,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650767186] [2022-11-03 02:43:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:43,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5107 trivial. 0 not checked. [2022-11-03 02:43:45,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:45,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650767186] [2022-11-03 02:43:45,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650767186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:45,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:45,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:43:45,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079713628] [2022-11-03 02:43:45,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:45,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:45,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:45,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:45,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:45,186 INFO L87 Difference]: Start difference. First operand has 1822 states, 1133 states have (on average 1.3583406884377758) internal successors, (1539), 1178 states have internal predecessors, (1539), 545 states have call successors, (545), 143 states have call predecessors, (545), 142 states have return successors, (533), 523 states have call predecessors, (533), 533 states have call successors, (533) Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2022-11-03 02:43:47,903 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 02:43:49,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:49,837 INFO L93 Difference]: Finished difference Result 5261 states and 7603 transitions. [2022-11-03 02:43:49,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:49,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 465 [2022-11-03 02:43:49,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:49,910 INFO L225 Difference]: With dead ends: 5261 [2022-11-03 02:43:49,911 INFO L226 Difference]: Without dead ends: 3478 [2022-11-03 02:43:49,931 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 02:43:49,936 INFO L413 NwaCegarLoop]: 2856 mSDtfsCounter, 2422 mSDsluCounter, 2598 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2424 SdHoareTripleChecker+Valid, 5227 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:49,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2424 Valid, 5227 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 471 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-03 02:43:49,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2022-11-03 02:43:50,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 3473. [2022-11-03 02:43:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3473 states, 2184 states have (on average 1.3484432234432235) internal successors, (2945), 2241 states have internal predecessors, (2945), 1010 states have call successors, (1010), 279 states have call predecessors, (1010), 278 states have return successors, (1004), 984 states have call predecessors, (1004), 1004 states have call successors, (1004) [2022-11-03 02:43:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3473 states to 3473 states and 4959 transitions. [2022-11-03 02:43:50,324 INFO L78 Accepts]: Start accepts. Automaton has 3473 states and 4959 transitions. Word has length 465 [2022-11-03 02:43:50,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:50,329 INFO L495 AbstractCegarLoop]: Abstraction has 3473 states and 4959 transitions. [2022-11-03 02:43:50,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2022-11-03 02:43:50,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3473 states and 4959 transitions. [2022-11-03 02:43:50,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2022-11-03 02:43:50,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:50,355 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:43:50,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:43:50,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:50,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1580318214, now seen corresponding path program 1 times [2022-11-03 02:43:50,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:50,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282009611] [2022-11-03 02:43:50,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:50,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5107 trivial. 0 not checked. [2022-11-03 02:43:51,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:51,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282009611] [2022-11-03 02:43:51,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282009611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:51,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:51,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:43:51,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095172600] [2022-11-03 02:43:51,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:51,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:51,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:51,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:51,327 INFO L87 Difference]: Start difference. First operand 3473 states and 4959 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-03 02:43:53,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:56,078 WARN L539 Checker$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 02:43:57,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:57,200 INFO L93 Difference]: Finished difference Result 10221 states and 14753 transitions. [2022-11-03 02:43:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:57,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 468 [2022-11-03 02:43:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:57,272 INFO L225 Difference]: With dead ends: 10221 [2022-11-03 02:43:57,272 INFO L226 Difference]: Without dead ends: 6831 [2022-11-03 02:43:57,295 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 02:43:57,296 INFO L413 NwaCegarLoop]: 3009 mSDtfsCounter, 2481 mSDsluCounter, 2447 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2481 SdHoareTripleChecker+Valid, 5232 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:57,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2481 Valid, 5232 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 503 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-03 02:43:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6831 states. [2022-11-03 02:43:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6831 to 6825. [2022-11-03 02:43:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6825 states, 4308 states have (on average 1.3516713091922006) internal successors, (5823), 4417 states have internal predecessors, (5823), 1969 states have call successors, (1969), 551 states have call predecessors, (1969), 547 states have return successors, (2050), 1920 states have call predecessors, (2050), 1962 states have call successors, (2050) [2022-11-03 02:43:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6825 states to 6825 states and 9842 transitions. [2022-11-03 02:43:57,728 INFO L78 Accepts]: Start accepts. Automaton has 6825 states and 9842 transitions. Word has length 468 [2022-11-03 02:43:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:57,731 INFO L495 AbstractCegarLoop]: Abstraction has 6825 states and 9842 transitions. [2022-11-03 02:43:57,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-03 02:43:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 6825 states and 9842 transitions. [2022-11-03 02:43:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2022-11-03 02:43:57,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:57,748 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:43:57,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:43:57,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:57,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1746047998, now seen corresponding path program 1 times [2022-11-03 02:43:57,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:57,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621990526] [2022-11-03 02:43:57,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:57,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5107 trivial. 0 not checked. [2022-11-03 02:43:58,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:58,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621990526] [2022-11-03 02:43:58,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621990526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:58,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:58,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:43:58,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561298266] [2022-11-03 02:43:58,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:58,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:58,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:58,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:58,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:58,420 INFO L87 Difference]: Start difference. First operand 6825 states and 9842 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-03 02:44:00,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:44:02,657 WARN L539 Checker$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 02:44:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:03,566 INFO L93 Difference]: Finished difference Result 6831 states and 9845 transitions. [2022-11-03 02:44:03,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:03,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 469 [2022-11-03 02:44:03,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:03,619 INFO L225 Difference]: With dead ends: 6831 [2022-11-03 02:44:03,620 INFO L226 Difference]: Without dead ends: 6828 [2022-11-03 02:44:03,627 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 02:44:03,630 INFO L413 NwaCegarLoop]: 2333 mSDtfsCounter, 2462 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2464 SdHoareTripleChecker+Valid, 2335 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:03,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2464 Valid, 2335 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 233 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 02:44:03,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6828 states. [2022-11-03 02:44:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6828 to 6828. [2022-11-03 02:44:04,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6828 states, 4310 states have (on average 1.351276102088167) internal successors, (5824), 4418 states have internal predecessors, (5824), 1968 states have call successors, (1968), 553 states have call predecessors, (1968), 549 states have return successors, (2050), 1920 states have call predecessors, (2050), 1962 states have call successors, (2050) [2022-11-03 02:44:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6828 states to 6828 states and 9842 transitions. [2022-11-03 02:44:04,096 INFO L78 Accepts]: Start accepts. Automaton has 6828 states and 9842 transitions. Word has length 469 [2022-11-03 02:44:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:04,098 INFO L495 AbstractCegarLoop]: Abstraction has 6828 states and 9842 transitions. [2022-11-03 02:44:04,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-03 02:44:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 6828 states and 9842 transitions. [2022-11-03 02:44:04,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-11-03 02:44:04,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:04,111 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:44:04,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:44:04,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:04,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:04,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1706268157, now seen corresponding path program 1 times [2022-11-03 02:44:04,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:04,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594897676] [2022-11-03 02:44:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:04,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5107 trivial. 0 not checked. [2022-11-03 02:44:04,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594897676] [2022-11-03 02:44:04,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594897676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:04,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:04,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:04,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619465398] [2022-11-03 02:44:04,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:04,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:04,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:04,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:04,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:04,780 INFO L87 Difference]: Start difference. First operand 6828 states and 9842 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-03 02:44:06,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:44:08,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:44:08,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:08,910 INFO L93 Difference]: Finished difference Result 6830 states and 9843 transitions. [2022-11-03 02:44:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:08,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 470 [2022-11-03 02:44:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:08,963 INFO L225 Difference]: With dead ends: 6830 [2022-11-03 02:44:08,963 INFO L226 Difference]: Without dead ends: 6827 [2022-11-03 02:44:08,970 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 02:44:08,974 INFO L413 NwaCegarLoop]: 2331 mSDtfsCounter, 2465 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2465 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:08,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2465 Valid, 2331 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-03 02:44:08,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6827 states. [2022-11-03 02:44:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6827 to 6827. [2022-11-03 02:44:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6827 states, 4310 states have (on average 1.3510440835266821) internal successors, (5823), 4417 states have internal predecessors, (5823), 1967 states have call successors, (1967), 553 states have call predecessors, (1967), 549 states have return successors, (2050), 1920 states have call predecessors, (2050), 1962 states have call successors, (2050) [2022-11-03 02:44:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6827 states to 6827 states and 9840 transitions. [2022-11-03 02:44:09,389 INFO L78 Accepts]: Start accepts. Automaton has 6827 states and 9840 transitions. Word has length 470 [2022-11-03 02:44:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:09,390 INFO L495 AbstractCegarLoop]: Abstraction has 6827 states and 9840 transitions. [2022-11-03 02:44:09,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-03 02:44:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 6827 states and 9840 transitions. [2022-11-03 02:44:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-11-03 02:44:09,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:09,403 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:44:09,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:44:09,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:09,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:09,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1353891429, now seen corresponding path program 1 times [2022-11-03 02:44:09,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:09,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224315040] [2022-11-03 02:44:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:09,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5107 trivial. 0 not checked. [2022-11-03 02:44:10,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:10,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224315040] [2022-11-03 02:44:10,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224315040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:10,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:10,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:10,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332459863] [2022-11-03 02:44:10,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:10,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:10,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:10,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:10,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:10,055 INFO L87 Difference]: Start difference. First operand 6827 states and 9840 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-03 02:44:12,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:44:14,325 WARN L539 Checker$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 02:44:15,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:15,383 INFO L93 Difference]: Finished difference Result 6829 states and 9841 transitions. [2022-11-03 02:44:15,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:15,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 471 [2022-11-03 02:44:15,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:15,439 INFO L225 Difference]: With dead ends: 6829 [2022-11-03 02:44:15,440 INFO L226 Difference]: Without dead ends: 6821 [2022-11-03 02:44:15,446 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 02:44:15,446 INFO L413 NwaCegarLoop]: 2330 mSDtfsCounter, 2456 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2458 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:15,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2458 Valid, 2332 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 02:44:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6821 states. [2022-11-03 02:44:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6821 to 6821. [2022-11-03 02:44:15,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6821 states, 4305 states have (on average 1.3505226480836237) internal successors, (5814), 4411 states have internal predecessors, (5814), 1966 states have call successors, (1966), 553 states have call predecessors, (1966), 549 states have return successors, (2050), 1920 states have call predecessors, (2050), 1962 states have call successors, (2050) [2022-11-03 02:44:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6821 states to 6821 states and 9830 transitions. [2022-11-03 02:44:15,923 INFO L78 Accepts]: Start accepts. Automaton has 6821 states and 9830 transitions. Word has length 471 [2022-11-03 02:44:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:15,924 INFO L495 AbstractCegarLoop]: Abstraction has 6821 states and 9830 transitions. [2022-11-03 02:44:15,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-03 02:44:15,924 INFO L276 IsEmpty]: Start isEmpty. Operand 6821 states and 9830 transitions. [2022-11-03 02:44:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-11-03 02:44:15,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:15,943 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 7, 7, 7, 7, 7, 7, 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] [2022-11-03 02:44:15,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:44:15,944 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:15,944 INFO L85 PathProgramCache]: Analyzing trace with hash -462969611, now seen corresponding path program 1 times [2022-11-03 02:44:15,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:15,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942008939] [2022-11-03 02:44:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:15,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5109 trivial. 0 not checked. [2022-11-03 02:44:16,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:16,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942008939] [2022-11-03 02:44:16,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942008939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:16,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:16,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:16,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520892044] [2022-11-03 02:44:16,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:16,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:16,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:16,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:16,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:16,559 INFO L87 Difference]: Start difference. First operand 6821 states and 9830 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2022-11-03 02:44:18,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:44:20,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:44:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:21,774 INFO L93 Difference]: Finished difference Result 18447 states and 26317 transitions. [2022-11-03 02:44:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:21,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 513 [2022-11-03 02:44:21,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:21,849 INFO L225 Difference]: With dead ends: 18447 [2022-11-03 02:44:21,849 INFO L226 Difference]: Without dead ends: 11709 [2022-11-03 02:44:21,892 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 02:44:21,893 INFO L413 NwaCegarLoop]: 2737 mSDtfsCounter, 1837 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1837 SdHoareTripleChecker+Valid, 4850 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:21,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1837 Valid, 4850 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-03 02:44:21,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2022-11-03 02:44:22,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11697. [2022-11-03 02:44:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11697 states, 7325 states have (on average 1.3348805460750852) internal successors, (9778), 7473 states have internal predecessors, (9778), 3358 states have call successors, (3358), 1019 states have call predecessors, (3358), 1013 states have return successors, (3458), 3304 states have call predecessors, (3458), 3354 states have call successors, (3458) [2022-11-03 02:44:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11697 states to 11697 states and 16594 transitions. [2022-11-03 02:44:22,582 INFO L78 Accepts]: Start accepts. Automaton has 11697 states and 16594 transitions. Word has length 513 [2022-11-03 02:44:22,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:22,583 INFO L495 AbstractCegarLoop]: Abstraction has 11697 states and 16594 transitions. [2022-11-03 02:44:22,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2022-11-03 02:44:22,583 INFO L276 IsEmpty]: Start isEmpty. Operand 11697 states and 16594 transitions. [2022-11-03 02:44:22,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-11-03 02:44:22,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:22,658 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 7, 7, 7, 7, 7, 7, 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] [2022-11-03 02:44:22,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:44:22,658 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:22,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:22,659 INFO L85 PathProgramCache]: Analyzing trace with hash -155664305, now seen corresponding path program 1 times [2022-11-03 02:44:22,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:22,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109487464] [2022-11-03 02:44:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:22,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5109 trivial. 0 not checked. [2022-11-03 02:44:23,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:23,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109487464] [2022-11-03 02:44:23,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109487464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:23,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:23,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:23,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018199905] [2022-11-03 02:44:23,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:23,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:23,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:23,395 INFO L87 Difference]: Start difference. First operand 11697 states and 16594 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-03 02:44:25,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:44:28,175 WARN L539 Checker$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 02:44:29,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:29,919 INFO L93 Difference]: Finished difference Result 34853 states and 49918 transitions. [2022-11-03 02:44:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:29,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 502 [2022-11-03 02:44:29,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:30,059 INFO L225 Difference]: With dead ends: 34853 [2022-11-03 02:44:30,060 INFO L226 Difference]: Without dead ends: 23239 [2022-11-03 02:44:30,119 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 02:44:30,120 INFO L413 NwaCegarLoop]: 2811 mSDtfsCounter, 2529 mSDsluCounter, 2477 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2529 SdHoareTripleChecker+Valid, 5062 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:30,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2529 Valid, 5062 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 469 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2022-11-03 02:44:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23239 states. [2022-11-03 02:44:31,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23239 to 23013. [2022-11-03 02:44:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23013 states, 14471 states have (on average 1.3381936286365834) internal successors, (19365), 14757 states have internal predecessors, (19365), 6572 states have call successors, (6572), 1979 states have call predecessors, (6572), 1969 states have return successors, (7112), 6468 states have call predecessors, (7112), 6568 states have call successors, (7112) [2022-11-03 02:44:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23013 states to 23013 states and 33049 transitions. [2022-11-03 02:44:31,937 INFO L78 Accepts]: Start accepts. Automaton has 23013 states and 33049 transitions. Word has length 502 [2022-11-03 02:44:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:31,938 INFO L495 AbstractCegarLoop]: Abstraction has 23013 states and 33049 transitions. [2022-11-03 02:44:31,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-03 02:44:31,939 INFO L276 IsEmpty]: Start isEmpty. Operand 23013 states and 33049 transitions. [2022-11-03 02:44:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2022-11-03 02:44:31,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:31,945 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 7, 7, 7, 7, 7, 7, 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] [2022-11-03 02:44:31,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:44:31,946 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:31,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:31,946 INFO L85 PathProgramCache]: Analyzing trace with hash 378349478, now seen corresponding path program 1 times [2022-11-03 02:44:31,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:31,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284554309] [2022-11-03 02:44:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5109 trivial. 0 not checked. [2022-11-03 02:44:32,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:32,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284554309] [2022-11-03 02:44:32,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284554309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:32,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:32,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:32,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253310136] [2022-11-03 02:44:32,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:32,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:32,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:32,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:32,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:32,767 INFO L87 Difference]: Start difference. First operand 23013 states and 33049 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-03 02:44:35,143 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 02:44:37,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:37,640 INFO L93 Difference]: Finished difference Result 46145 states and 66393 transitions. [2022-11-03 02:44:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:37,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 500 [2022-11-03 02:44:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:37,774 INFO L225 Difference]: With dead ends: 46145 [2022-11-03 02:44:37,774 INFO L226 Difference]: Without dead ends: 23215 [2022-11-03 02:44:37,883 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 02:44:37,883 INFO L413 NwaCegarLoop]: 2808 mSDtfsCounter, 2517 mSDsluCounter, 2474 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2519 SdHoareTripleChecker+Valid, 5057 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:37,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2519 Valid, 5057 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 469 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 02:44:37,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23215 states. [2022-11-03 02:44:39,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23215 to 22989. [2022-11-03 02:44:39,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22989 states, 14459 states have (on average 1.3376443737464554) internal successors, (19341), 14745 states have internal predecessors, (19341), 6560 states have call successors, (6560), 1979 states have call predecessors, (6560), 1969 states have return successors, (7064), 6456 states have call predecessors, (7064), 6556 states have call successors, (7064) [2022-11-03 02:44:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22989 states to 22989 states and 32965 transitions. [2022-11-03 02:44:39,653 INFO L78 Accepts]: Start accepts. Automaton has 22989 states and 32965 transitions. Word has length 500 [2022-11-03 02:44:39,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:39,654 INFO L495 AbstractCegarLoop]: Abstraction has 22989 states and 32965 transitions. [2022-11-03 02:44:39,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-03 02:44:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 22989 states and 32965 transitions. [2022-11-03 02:44:39,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2022-11-03 02:44:39,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:39,664 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 7, 7, 7, 7, 7, 7, 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] [2022-11-03 02:44:39,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:44:39,665 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:39,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:39,666 INFO L85 PathProgramCache]: Analyzing trace with hash 140689790, now seen corresponding path program 1 times [2022-11-03 02:44:39,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:39,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500384316] [2022-11-03 02:44:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:39,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5109 trivial. 0 not checked. [2022-11-03 02:44:40,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:40,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500384316] [2022-11-03 02:44:40,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500384316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:40,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:40,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:40,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366265243] [2022-11-03 02:44:40,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:40,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:40,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:40,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:40,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:40,488 INFO L87 Difference]: Start difference. First operand 22989 states and 32965 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-03 02:44:42,516 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 02:44:44,697 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 02:44:47,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:47,545 INFO L93 Difference]: Finished difference Result 46110 states and 66237 transitions. [2022-11-03 02:44:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:47,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 499 [2022-11-03 02:44:47,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:47,679 INFO L225 Difference]: With dead ends: 46110 [2022-11-03 02:44:47,680 INFO L226 Difference]: Without dead ends: 23204 [2022-11-03 02:44:47,767 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 02:44:47,767 INFO L413 NwaCegarLoop]: 2812 mSDtfsCounter, 2390 mSDsluCounter, 2592 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2392 SdHoareTripleChecker+Valid, 5177 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:47,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2392 Valid, 5177 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 474 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 02:44:47,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23204 states. [2022-11-03 02:44:49,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23204 to 22978. [2022-11-03 02:44:49,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22978 states, 14454 states have (on average 1.3370001383700014) internal successors, (19325), 14740 states have internal predecessors, (19325), 6550 states have call successors, (6550), 1983 states have call predecessors, (6550), 1973 states have return successors, (7018), 6446 states have call predecessors, (7018), 6546 states have call successors, (7018) [2022-11-03 02:44:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22978 states to 22978 states and 32893 transitions. [2022-11-03 02:44:49,176 INFO L78 Accepts]: Start accepts. Automaton has 22978 states and 32893 transitions. Word has length 499 [2022-11-03 02:44:49,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:49,177 INFO L495 AbstractCegarLoop]: Abstraction has 22978 states and 32893 transitions. [2022-11-03 02:44:49,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-03 02:44:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 22978 states and 32893 transitions. [2022-11-03 02:44:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2022-11-03 02:44:49,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:49,185 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 7, 7, 7, 7, 7, 7, 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] [2022-11-03 02:44:49,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:44:49,185 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:49,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:49,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1236684025, now seen corresponding path program 1 times [2022-11-03 02:44:49,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:49,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959981489] [2022-11-03 02:44:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:49,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5109 trivial. 0 not checked. [2022-11-03 02:44:49,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:49,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959981489] [2022-11-03 02:44:49,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959981489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:49,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:49,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:49,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820632489] [2022-11-03 02:44:49,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:49,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:49,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:49,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:49,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:49,926 INFO L87 Difference]: Start difference. First operand 22978 states and 32893 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-03 02:44:51,949 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 02:44:54,785 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 02:44:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:57,155 INFO L93 Difference]: Finished difference Result 45000 states and 64487 transitions. [2022-11-03 02:44:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:57,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 501 [2022-11-03 02:44:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:57,265 INFO L225 Difference]: With dead ends: 45000 [2022-11-03 02:44:57,265 INFO L226 Difference]: Without dead ends: 22118 [2022-11-03 02:44:57,349 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 02:44:57,350 INFO L413 NwaCegarLoop]: 3002 mSDtfsCounter, 2380 mSDsluCounter, 2584 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2382 SdHoareTripleChecker+Valid, 5359 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:57,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2382 Valid, 5359 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 514 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2022-11-03 02:44:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22118 states. [2022-11-03 02:44:58,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22118 to 21892. [2022-11-03 02:44:58,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21892 states, 13804 states have (on average 1.340408577223993) internal successors, (18503), 14074 states have internal predecessors, (18503), 6194 states have call successors, (6194), 1901 states have call predecessors, (6194), 1893 states have return successors, (6530), 6096 states have call predecessors, (6530), 6190 states have call successors, (6530) [2022-11-03 02:44:58,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21892 states to 21892 states and 31227 transitions. [2022-11-03 02:44:58,608 INFO L78 Accepts]: Start accepts. Automaton has 21892 states and 31227 transitions. Word has length 501 [2022-11-03 02:44:58,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:58,609 INFO L495 AbstractCegarLoop]: Abstraction has 21892 states and 31227 transitions. [2022-11-03 02:44:58,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-03 02:44:58,610 INFO L276 IsEmpty]: Start isEmpty. Operand 21892 states and 31227 transitions. [2022-11-03 02:44:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2022-11-03 02:44:58,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:58,641 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 7, 7, 7, 7, 7, 7, 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] [2022-11-03 02:44:58,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:44:58,642 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:58,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:58,642 INFO L85 PathProgramCache]: Analyzing trace with hash 2048984810, now seen corresponding path program 1 times [2022-11-03 02:44:58,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:58,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693215313] [2022-11-03 02:44:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:58,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7562 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7559 trivial. 0 not checked. [2022-11-03 02:44:59,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:59,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693215313] [2022-11-03 02:44:59,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693215313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:59,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:59,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:59,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036523837] [2022-11-03 02:44:59,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:59,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:59,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:59,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:59,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:59,324 INFO L87 Difference]: Start difference. First operand 21892 states and 31227 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) [2022-11-03 02:45:02,158 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 02:45:06,588 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 02:45:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:08,889 INFO L93 Difference]: Finished difference Result 55218 states and 78745 transitions. [2022-11-03 02:45:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:08,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) Word has length 620 [2022-11-03 02:45:08,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:09,082 INFO L225 Difference]: With dead ends: 55218 [2022-11-03 02:45:09,082 INFO L226 Difference]: Without dead ends: 33422 [2022-11-03 02:45:09,188 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 02:45:09,189 INFO L413 NwaCegarLoop]: 3940 mSDtfsCounter, 2306 mSDsluCounter, 2205 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 46 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2306 SdHoareTripleChecker+Valid, 5943 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:09,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2306 Valid, 5943 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 728 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2022-11-03 02:45:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33422 states. [2022-11-03 02:45:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33422 to 33408. [2022-11-03 02:45:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33408 states, 21136 states have (on average 1.3336014383043149) internal successors, (28187), 21590 states have internal predecessors, (28187), 9342 states have call successors, (9342), 2941 states have call predecessors, (9342), 2929 states have return successors, (9846), 9164 states have call predecessors, (9846), 9338 states have call successors, (9846) [2022-11-03 02:45:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33408 states to 33408 states and 47375 transitions. [2022-11-03 02:45:11,090 INFO L78 Accepts]: Start accepts. Automaton has 33408 states and 47375 transitions. Word has length 620 [2022-11-03 02:45:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:11,092 INFO L495 AbstractCegarLoop]: Abstraction has 33408 states and 47375 transitions. [2022-11-03 02:45:11,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) [2022-11-03 02:45:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 33408 states and 47375 transitions. [2022-11-03 02:45:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2022-11-03 02:45:11,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:11,138 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 7, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:45:11,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:45:11,139 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:11,139 INFO L85 PathProgramCache]: Analyzing trace with hash -333030375, now seen corresponding path program 1 times [2022-11-03 02:45:11,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:11,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187797118] [2022-11-03 02:45:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:11,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7570 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2022-11-03 02:45:13,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:13,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187797118] [2022-11-03 02:45:13,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187797118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:13,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920743567] [2022-11-03 02:45:13,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:13,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:13,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:13,969 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:13,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:45:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:15,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 5526 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:45:15,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7570 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 7184 trivial. 0 not checked. [2022-11-03 02:45:16,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:16,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920743567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:16,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:16,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 02:45:16,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990128455] [2022-11-03 02:45:16,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:16,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:45:16,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:16,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:45:16,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:45:16,080 INFO L87 Difference]: Start difference. First operand 33408 states and 47375 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 3 states have call successors, (64), 3 states have call predecessors, (64), 3 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2022-11-03 02:45:18,697 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 02:45:22,870 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 02:45:27,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:27,520 INFO L93 Difference]: Finished difference Result 78249 states and 111416 transitions. [2022-11-03 02:45:27,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:45:27,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 3 states have call successors, (64), 3 states have call predecessors, (64), 3 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) Word has length 630 [2022-11-03 02:45:27,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:27,700 INFO L225 Difference]: With dead ends: 78249 [2022-11-03 02:45:27,700 INFO L226 Difference]: Without dead ends: 44937 [2022-11-03 02:45:27,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 634 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:45:27,818 INFO L413 NwaCegarLoop]: 4265 mSDtfsCounter, 2796 mSDsluCounter, 3557 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 51 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2874 SdHoareTripleChecker+Valid, 7401 SdHoareTripleChecker+Invalid, 2145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:27,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2874 Valid, 7401 Invalid, 2145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2092 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2022-11-03 02:45:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44937 states. [2022-11-03 02:45:30,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44937 to 42122. [2022-11-03 02:45:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42122 states, 26656 states have (on average 1.332045318127251) internal successors, (35507), 27174 states have internal predecessors, (35507), 11720 states have call successors, (11720), 3759 states have call predecessors, (11720), 3745 states have return successors, (12276), 11532 states have call predecessors, (12276), 11716 states have call successors, (12276) [2022-11-03 02:45:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42122 states to 42122 states and 59503 transitions. [2022-11-03 02:45:30,348 INFO L78 Accepts]: Start accepts. Automaton has 42122 states and 59503 transitions. Word has length 630 [2022-11-03 02:45:30,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:30,350 INFO L495 AbstractCegarLoop]: Abstraction has 42122 states and 59503 transitions. [2022-11-03 02:45:30,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 3 states have call successors, (64), 3 states have call predecessors, (64), 3 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2022-11-03 02:45:30,350 INFO L276 IsEmpty]: Start isEmpty. Operand 42122 states and 59503 transitions. [2022-11-03 02:45:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2022-11-03 02:45:30,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:30,410 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 7, 7, 7, 7, 7, 7, 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] [2022-11-03 02:45:30,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:30,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:45:30,627 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:30,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:30,627 INFO L85 PathProgramCache]: Analyzing trace with hash 16355168, now seen corresponding path program 1 times [2022-11-03 02:45:30,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:30,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491257869] [2022-11-03 02:45:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:30,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7566 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2022-11-03 02:45:34,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:34,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491257869] [2022-11-03 02:45:34,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491257869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:34,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351253319] [2022-11-03 02:45:34,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:34,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:34,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:34,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:34,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:45:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:40,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 5708 conjuncts, 145 conjunts are in the unsatisfiable core [2022-11-03 02:45:40,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:40,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:45:40,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:45:40,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:45:40,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:45:40,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 02:45:40,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 02:45:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7566 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7562 trivial. 0 not checked. [2022-11-03 02:45:40,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:40,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351253319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:40,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:40,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 13 [2022-11-03 02:45:40,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101388444] [2022-11-03 02:45:40,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:40,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:45:40,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:40,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:45:40,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:45:40,358 INFO L87 Difference]: Start difference. First operand 42122 states and 59503 transitions. Second operand has 13 states, 11 states have (on average 12.0) internal successors, (132), 9 states have internal predecessors, (132), 3 states have call successors, (65), 3 states have call predecessors, (65), 5 states have return successors, (60), 5 states have call predecessors, (60), 2 states have call successors, (60) [2022-11-03 02:45:42,381 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 02:45:47,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:45:49,206 WARN L539 Checker$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 02:45:51,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:45:53,276 WARN L539 Checker$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 02:45:55,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:46:00,079 WARN L539 Checker$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 02:46:02,113 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 02:46:08,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:08,843 INFO L93 Difference]: Finished difference Result 99066 states and 145266 transitions. [2022-11-03 02:46:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:46:08,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.0) internal successors, (132), 9 states have internal predecessors, (132), 3 states have call successors, (65), 3 states have call predecessors, (65), 5 states have return successors, (60), 5 states have call predecessors, (60), 2 states have call successors, (60) Word has length 638 [2022-11-03 02:46:08,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:09,212 INFO L225 Difference]: With dead ends: 99066 [2022-11-03 02:46:09,212 INFO L226 Difference]: Without dead ends: 57040 [2022-11-03 02:46:09,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 635 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:46:09,315 INFO L413 NwaCegarLoop]: 3468 mSDtfsCounter, 885 mSDsluCounter, 35735 mSDsCounter, 0 mSdLazyCounter, 3898 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 36827 SdHoareTripleChecker+Invalid, 3907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3898 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:09,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 36827 Invalid, 3907 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 3898 Invalid, 6 Unknown, 0 Unchecked, 25.8s Time] [2022-11-03 02:46:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57040 states. [2022-11-03 02:46:12,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57040 to 42218. [2022-11-03 02:46:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42218 states, 26712 states have (on average 1.3313492063492063) internal successors, (35563), 27230 states have internal predecessors, (35563), 11720 states have call successors, (11720), 3759 states have call predecessors, (11720), 3785 states have return successors, (12500), 11556 states have call predecessors, (12500), 11716 states have call successors, (12500) [2022-11-03 02:46:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42218 states to 42218 states and 59783 transitions. [2022-11-03 02:46:12,223 INFO L78 Accepts]: Start accepts. Automaton has 42218 states and 59783 transitions. Word has length 638 [2022-11-03 02:46:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:12,224 INFO L495 AbstractCegarLoop]: Abstraction has 42218 states and 59783 transitions. [2022-11-03 02:46:12,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.0) internal successors, (132), 9 states have internal predecessors, (132), 3 states have call successors, (65), 3 states have call predecessors, (65), 5 states have return successors, (60), 5 states have call predecessors, (60), 2 states have call successors, (60) [2022-11-03 02:46:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 42218 states and 59783 transitions. [2022-11-03 02:46:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2022-11-03 02:46:12,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:12,249 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 7, 7, 7, 7, 7, 7, 3, 3, 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] [2022-11-03 02:46:12,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:46:12,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:12,458 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:12,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:12,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1338711441, now seen corresponding path program 1 times [2022-11-03 02:46:12,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:12,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552243740] [2022-11-03 02:46:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:12,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7574 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7568 trivial. 0 not checked. [2022-11-03 02:46:15,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:15,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552243740] [2022-11-03 02:46:15,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552243740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:15,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971869790] [2022-11-03 02:46:15,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:15,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:15,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:15,189 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:15,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:46:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:16,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 5620 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:46:16,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7574 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 7184 trivial. 0 not checked. [2022-11-03 02:46:17,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:17,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971869790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:17,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:17,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 02:46:17,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392104110] [2022-11-03 02:46:17,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:17,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:46:17,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:17,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:46:17,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:46:17,092 INFO L87 Difference]: Start difference. First operand 42218 states and 59783 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 3 states have call successors, (67), 3 states have call predecessors, (67), 3 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2022-11-03 02:46:23,199 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 02:46:24,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:46:29,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:29,399 INFO L93 Difference]: Finished difference Result 95879 states and 136240 transitions. [2022-11-03 02:46:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:46:29,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 3 states have call successors, (67), 3 states have call predecessors, (67), 3 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) Word has length 645 [2022-11-03 02:46:29,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:29,794 INFO L225 Difference]: With dead ends: 95879 [2022-11-03 02:46:29,794 INFO L226 Difference]: Without dead ends: 53757 [2022-11-03 02:46:29,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:46:29,893 INFO L413 NwaCegarLoop]: 4259 mSDtfsCounter, 2791 mSDsluCounter, 3560 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2867 SdHoareTripleChecker+Valid, 7395 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:29,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2867 Valid, 7395 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2097 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2022-11-03 02:46:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53757 states. [2022-11-03 02:46:32,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53757 to 42230. [2022-11-03 02:46:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42230 states, 26718 states have (on average 1.331274796017666) internal successors, (35569), 27236 states have internal predecessors, (35569), 11722 states have call successors, (11722), 3763 states have call predecessors, (11722), 3789 states have return successors, (12502), 11558 states have call predecessors, (12502), 11718 states have call successors, (12502) [2022-11-03 02:46:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42230 states to 42230 states and 59793 transitions. [2022-11-03 02:46:32,745 INFO L78 Accepts]: Start accepts. Automaton has 42230 states and 59793 transitions. Word has length 645 [2022-11-03 02:46:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:32,746 INFO L495 AbstractCegarLoop]: Abstraction has 42230 states and 59793 transitions. [2022-11-03 02:46:32,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 3 states have call successors, (67), 3 states have call predecessors, (67), 3 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2022-11-03 02:46:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 42230 states and 59793 transitions. [2022-11-03 02:46:32,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 653 [2022-11-03 02:46:32,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:32,767 INFO L195 NwaCegarLoop]: trace histogram [41, 39, 39, 39, 39, 39, 39, 39, 39, 7, 7, 7, 7, 7, 7, 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] [2022-11-03 02:46:32,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:32,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:46:32,987 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:32,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:32,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1104795134, now seen corresponding path program 1 times [2022-11-03 02:46:32,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:32,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287093099] [2022-11-03 02:46:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:32,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7724 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 7694 trivial. 0 not checked. [2022-11-03 02:46:36,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:36,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287093099] [2022-11-03 02:46:36,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287093099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:36,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092830135] [2022-11-03 02:46:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:36,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:36,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:36,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:36,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:46:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:41,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 5771 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:46:41,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7724 backedges. 2462 proven. 0 refuted. 0 times theorem prover too weak. 5262 trivial. 0 not checked. [2022-11-03 02:46:41,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:41,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092830135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:41,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:41,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-11-03 02:46:41,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75834735] [2022-11-03 02:46:41,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:41,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:46:41,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:41,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:46:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:46:41,753 INFO L87 Difference]: Start difference. First operand 42230 states and 59793 transitions. Second operand has 6 states, 4 states have (on average 36.75) internal successors, (147), 6 states have internal predecessors, (147), 3 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) [2022-11-03 02:46:43,776 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 02:46:47,517 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 02:46:51,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:51,271 INFO L93 Difference]: Finished difference Result 84452 states and 121913 transitions. [2022-11-03 02:46:51,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:46:51,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 36.75) internal successors, (147), 6 states have internal predecessors, (147), 3 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) Word has length 652 [2022-11-03 02:46:51,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:51,541 INFO L225 Difference]: With dead ends: 84452 [2022-11-03 02:46:51,541 INFO L226 Difference]: Without dead ends: 42295 [2022-11-03 02:46:51,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:46:51,760 INFO L413 NwaCegarLoop]: 2308 mSDtfsCounter, 3 mSDsluCounter, 10110 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11507 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:51,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11507 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1269 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2022-11-03 02:46:51,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42295 states. [2022-11-03 02:46:54,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42295 to 42295. [2022-11-03 02:46:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42295 states, 26751 states have (on average 1.3320623528092408) internal successors, (35634), 27301 states have internal predecessors, (35634), 11722 states have call successors, (11722), 3763 states have call predecessors, (11722), 3821 states have return successors, (12790), 11558 states have call predecessors, (12790), 11718 states have call successors, (12790) [2022-11-03 02:46:54,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42295 states to 42295 states and 60146 transitions. [2022-11-03 02:46:54,903 INFO L78 Accepts]: Start accepts. Automaton has 42295 states and 60146 transitions. Word has length 652 [2022-11-03 02:46:54,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:54,903 INFO L495 AbstractCegarLoop]: Abstraction has 42295 states and 60146 transitions. [2022-11-03 02:46:54,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 36.75) internal successors, (147), 6 states have internal predecessors, (147), 3 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) [2022-11-03 02:46:54,904 INFO L276 IsEmpty]: Start isEmpty. Operand 42295 states and 60146 transitions. [2022-11-03 02:46:54,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 660 [2022-11-03 02:46:54,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:54,942 INFO L195 NwaCegarLoop]: trace histogram [41, 39, 39, 39, 39, 39, 39, 39, 39, 7, 7, 7, 7, 7, 7, 7, 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] [2022-11-03 02:46:55,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:55,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:46:55,159 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:55,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1676638981, now seen corresponding path program 1 times [2022-11-03 02:46:55,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:55,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535673598] [2022-11-03 02:46:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:55,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7794 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 7745 trivial. 0 not checked. [2022-11-03 02:46:59,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:59,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535673598] [2022-11-03 02:46:59,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535673598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:59,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706438752] [2022-11-03 02:46:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:59,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:59,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:59,127 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:59,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4234159f-d194-4913-b3d9-0a8700f4b0be/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:47:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:05,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 5876 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:47:05,432 INFO L286 TraceCheckSpWp]: Computing forward predicates...