./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.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_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/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_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/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_a36cf75e-31a5-480d-91b2-042d47b33b3a/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 f37aa3f5f53d7516c3aab2329ab9f19add00a9b7f37383228b3b0ae48d55a761 --- 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 02:41:27,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:41:27,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:41:27,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:41:27,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:41:27,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:41:27,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:41:27,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:41:27,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:41:27,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:41:27,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:41:27,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:41:27,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:41:27,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:41:27,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:41:27,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:41:27,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:41:27,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:41:27,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:41:27,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:41:27,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:41:27,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:41:27,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:41:27,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:41:27,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:41:27,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:41:27,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:41:27,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:41:27,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:41:27,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:41:27,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:41:27,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:41:27,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:41:27,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:41:27,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:41:27,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:41:27,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:41:27,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:41:27,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:41:27,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:41:27,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:41:27,962 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:41:27,983 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:41:27,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:41:27,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:41:27,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:41:27,984 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:41:27,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:41:27,985 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:41:27,985 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:41:27,985 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:41:27,985 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:41:27,985 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:41:27,986 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:41:27,986 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:41:27,986 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:41:27,986 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:41:27,986 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:41:27,987 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:41:27,987 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:41:27,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:41:27,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:41:27,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:41:27,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:41:27,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:41:27,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:41:27,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:41:27,989 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:41:27,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:41:27,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:41:27,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:41:27,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:27,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:41:27,996 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:41:27,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:41:27,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:41:27,997 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:41:27,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:41:27,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:41:27,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:41:27,998 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_a36cf75e-31a5-480d-91b2-042d47b33b3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f37aa3f5f53d7516c3aab2329ab9f19add00a9b7f37383228b3b0ae48d55a761 [2022-11-03 02:41:28,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:41:28,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:41:28,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:41:28,277 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:41:28,279 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:41:28,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i [2022-11-03 02:41:28,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/data/0b3d4d9b4/9211bc820fe648609db9f6ff87994f1a/FLAG1fec4a02f [2022-11-03 02:41:29,076 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:41:29,077 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i [2022-11-03 02:41:29,108 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/data/0b3d4d9b4/9211bc820fe648609db9f6ff87994f1a/FLAG1fec4a02f [2022-11-03 02:41:29,195 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/data/0b3d4d9b4/9211bc820fe648609db9f6ff87994f1a [2022-11-03 02:41:29,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:41:29,199 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:41:29,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:29,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:41:29,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:41:29,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:29" (1/1) ... [2022-11-03 02:41:29,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2545527e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:29, skipping insertion in model container [2022-11-03 02:41:29,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:29" (1/1) ... [2022-11-03 02:41:29,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:41:29,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:41:30,524 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_a36cf75e-31a5-480d-91b2-042d47b33b3a/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i[148417,148430] [2022-11-03 02:41:30,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:30,694 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:41:30,987 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_a36cf75e-31a5-480d-91b2-042d47b33b3a/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i[148417,148430] [2022-11-03 02:41:31,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:31,133 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:41:31,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:31 WrapperNode [2022-11-03 02:41:31,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:31,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:31,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:41:31,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:41:31,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:31" (1/1) ... [2022-11-03 02:41:31,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:31" (1/1) ... [2022-11-03 02:41:31,356 INFO L138 Inliner]: procedures = 167, calls = 920, calls flagged for inlining = 60, calls inlined = 52, statements flattened = 1903 [2022-11-03 02:41:31,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:31,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:41:31,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:41:31,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:41:31,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:31" (1/1) ... [2022-11-03 02:41:31,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:31" (1/1) ... [2022-11-03 02:41:31,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:31" (1/1) ... [2022-11-03 02:41:31,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:31" (1/1) ... [2022-11-03 02:41:31,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:31" (1/1) ... [2022-11-03 02:41:31,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:31" (1/1) ... [2022-11-03 02:41:31,508 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:31" (1/1) ... [2022-11-03 02:41:31,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:31" (1/1) ... [2022-11-03 02:41:31,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:41:31,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:41:31,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:41:31,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:41:31,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:31" (1/1) ... [2022-11-03 02:41:31,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:31,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:31,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:41:31,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:41:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure do_pcd_request [2022-11-03 02:41:31,654 INFO L138 BoogieDeclarations]: Found implementation of procedure do_pcd_request [2022-11-03 02:41:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2022-11-03 02:41:31,655 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2022-11-03 02:41:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2022-11-03 02:41:31,655 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2022-11-03 02:41:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_audio_ioctl [2022-11-03 02:41:31,655 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_audio_ioctl [2022-11-03 02:41:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2022-11-03 02:41:31,655 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2022-11-03 02:41:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2022-11-03 02:41:31,656 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2022-11-03 02:41:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 02:41:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure ps_set_intr [2022-11-03 02:41:31,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ps_set_intr [2022-11-03 02:41:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_packet [2022-11-03 02:41:31,656 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_packet [2022-11-03 02:41:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:41:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:41:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:41:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_drive_status [2022-11-03 02:41:31,657 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_drive_status [2022-11-03 02:41:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2022-11-03 02:41:31,657 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2022-11-03 02:41:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 02:41:31,657 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 02:41:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:41:31,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:41:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_blkdev [2022-11-03 02:41:31,658 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_blkdev [2022-11-03 02:41:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_tray_move [2022-11-03 02:41:31,659 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_tray_move [2022-11-03 02:41:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure do_pcd_read [2022-11-03 02:41:31,659 INFO L138 BoogieDeclarations]: Found implementation of procedure do_pcd_read [2022-11-03 02:41:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:41:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 02:41:31,659 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 02:41:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_check_events [2022-11-03 02:41:31,660 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_check_events [2022-11-03 02:41:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:41:31,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:41:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_lock_door [2022-11-03 02:41:31,660 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_lock_door [2022-11-03 02:41:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:41:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2022-11-03 02:41:31,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2022-11-03 02:41:31,661 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 02:41:31,662 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 02:41:31,662 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_block_check_events [2022-11-03 02:41:31,663 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_block_check_events [2022-11-03 02:41:31,663 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-03 02:41:31,663 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-03 02:41:31,664 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_sleep [2022-11-03 02:41:31,664 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_sleep [2022-11-03 02:41:31,664 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_wait [2022-11-03 02:41:31,664 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_wait [2022-11-03 02:41:31,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:41:31,665 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_atapi [2022-11-03 02:41:31,665 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_atapi [2022-11-03 02:41:31,665 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_pcd_mutex [2022-11-03 02:41:31,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_pcd_mutex [2022-11-03 02:41:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_get_mcn [2022-11-03 02:41:31,666 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_get_mcn [2022-11-03 02:41:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-03 02:41:31,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-03 02:41:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:41:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:41:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_identify [2022-11-03 02:41:31,666 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_identify [2022-11-03 02:41:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure next_request [2022-11-03 02:41:31,667 INFO L138 BoogieDeclarations]: Found implementation of procedure next_request [2022-11-03 02:41:31,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:41:31,668 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-03 02:41:31,668 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-03 02:41:31,668 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_probe [2022-11-03 02:41:31,668 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_probe [2022-11-03 02:41:31,668 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_command [2022-11-03 02:41:31,668 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_command [2022-11-03 02:41:31,668 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_completion [2022-11-03 02:41:31,668 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_completion [2022-11-03 02:41:31,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:41:31,669 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_drive_reset [2022-11-03 02:41:31,669 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_drive_reset [2022-11-03 02:41:31,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:41:31,670 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2022-11-03 02:41:31,670 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2022-11-03 02:41:31,670 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2022-11-03 02:41:31,671 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2022-11-03 02:41:31,671 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2022-11-03 02:41:31,671 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2022-11-03 02:41:31,671 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_pcd_mutex [2022-11-03 02:41:31,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_pcd_mutex [2022-11-03 02:41:31,672 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2022-11-03 02:41:31,672 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2022-11-03 02:41:31,673 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-03 02:41:31,674 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-03 02:41:31,674 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2022-11-03 02:41:31,729 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2022-11-03 02:41:31,729 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_reset [2022-11-03 02:41:31,729 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_reset [2022-11-03 02:41:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:41:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_block_ioctl [2022-11-03 02:41:31,730 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_block_ioctl [2022-11-03 02:41:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 02:41:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:41:31,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:41:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure pi_do_claimed [2022-11-03 02:41:31,730 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_do_claimed [2022-11-03 02:41:32,244 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:41:32,247 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:41:37,522 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:41:38,159 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:41:38,159 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-03 02:41:38,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:38 BoogieIcfgContainer [2022-11-03 02:41:38,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:41:38,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:41:38,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:41:38,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:41:38,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:41:29" (1/3) ... [2022-11-03 02:41:38,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ce7a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:38, skipping insertion in model container [2022-11-03 02:41:38,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:31" (2/3) ... [2022-11-03 02:41:38,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ce7a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:38, skipping insertion in model container [2022-11-03 02:41:38,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:38" (3/3) ... [2022-11-03 02:41:38,172 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i [2022-11-03 02:41:38,193 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:41:38,193 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:41:38,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:41:38,262 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;@4bf9b4b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:41:38,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:41:38,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 561 states, 358 states have (on average 1.4078212290502794) internal successors, (504), 382 states have internal predecessors, (504), 160 states have call successors, (160), 46 states have call predecessors, (160), 46 states have return successors, (160), 155 states have call predecessors, (160), 160 states have call successors, (160) [2022-11-03 02:41:38,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 02:41:38,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:38,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:38,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:38,286 INFO L85 PathProgramCache]: Analyzing trace with hash -661068168, now seen corresponding path program 1 times [2022-11-03 02:41:38,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:38,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834277305] [2022-11-03 02:41:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:38,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:38,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:38,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834277305] [2022-11-03 02:41:38,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834277305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:38,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:38,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:41:38,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982395796] [2022-11-03 02:41:38,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:38,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:38,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:38,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:38,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:38,905 INFO L87 Difference]: Start difference. First operand has 561 states, 358 states have (on average 1.4078212290502794) internal successors, (504), 382 states have internal predecessors, (504), 160 states have call successors, (160), 46 states have call predecessors, (160), 46 states have return successors, (160), 155 states have call predecessors, (160), 160 states have call successors, (160) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:41,437 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 02:41:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:43,702 INFO L93 Difference]: Finished difference Result 1591 states and 2407 transitions. [2022-11-03 02:41:43,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:43,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-03 02:41:43,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:43,726 INFO L225 Difference]: With dead ends: 1591 [2022-11-03 02:41:43,726 INFO L226 Difference]: Without dead ends: 1027 [2022-11-03 02:41:43,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:41:43,740 INFO L413 NwaCegarLoop]: 835 mSDtfsCounter, 695 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:43,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 1505 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-03 02:41:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-11-03 02:41:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 1013. [2022-11-03 02:41:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 640 states have (on average 1.4015625) internal successors, (897), 672 states have internal predecessors, (897), 288 states have call successors, (288), 85 states have call predecessors, (288), 84 states have return successors, (282), 271 states have call predecessors, (282), 282 states have call successors, (282) [2022-11-03 02:41:43,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1467 transitions. [2022-11-03 02:41:43,877 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1467 transitions. Word has length 14 [2022-11-03 02:41:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:43,878 INFO L495 AbstractCegarLoop]: Abstraction has 1013 states and 1467 transitions. [2022-11-03 02:41:43,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1467 transitions. [2022-11-03 02:41:43,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:41:43,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:43,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:43,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:41:43,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:43,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:43,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1884411406, now seen corresponding path program 1 times [2022-11-03 02:41:43,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:43,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124012544] [2022-11-03 02:41:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:43,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:44,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:44,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124012544] [2022-11-03 02:41:44,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124012544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:44,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:44,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:41:44,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149126935] [2022-11-03 02:41:44,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:44,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:44,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:44,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:44,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:44,132 INFO L87 Difference]: Start difference. First operand 1013 states and 1467 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:41:46,562 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 02:41:49,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:49,073 INFO L93 Difference]: Finished difference Result 2627 states and 3787 transitions. [2022-11-03 02:41:49,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:49,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-03 02:41:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:49,088 INFO L225 Difference]: With dead ends: 2627 [2022-11-03 02:41:49,089 INFO L226 Difference]: Without dead ends: 1615 [2022-11-03 02:41:49,093 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 02:41:49,095 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 663 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:49,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1493 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 204 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 02:41:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2022-11-03 02:41:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1613. [2022-11-03 02:41:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1012 states have (on average 1.3863636363636365) internal successors, (1403), 1060 states have internal predecessors, (1403), 459 states have call successors, (459), 142 states have call predecessors, (459), 141 states have return successors, (453), 437 states have call predecessors, (453), 453 states have call successors, (453) [2022-11-03 02:41:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2315 transitions. [2022-11-03 02:41:49,225 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2315 transitions. Word has length 16 [2022-11-03 02:41:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:49,226 INFO L495 AbstractCegarLoop]: Abstraction has 1613 states and 2315 transitions. [2022-11-03 02:41:49,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:41:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2315 transitions. [2022-11-03 02:41:49,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:41:49,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:49,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:49,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:41:49,229 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:49,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash -2116922592, now seen corresponding path program 1 times [2022-11-03 02:41:49,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:49,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851753105] [2022-11-03 02:41:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:49,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:49,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:49,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851753105] [2022-11-03 02:41:49,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851753105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:49,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:49,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:41:49,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778178106] [2022-11-03 02:41:49,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:49,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:49,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:49,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:49,384 INFO L87 Difference]: Start difference. First operand 1613 states and 2315 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:52,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:41:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:55,080 INFO L93 Difference]: Finished difference Result 3829 states and 5482 transitions. [2022-11-03 02:41:55,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:55,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 02:41:55,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:55,103 INFO L225 Difference]: With dead ends: 3829 [2022-11-03 02:41:55,103 INFO L226 Difference]: Without dead ends: 2456 [2022-11-03 02:41:55,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:41:55,114 INFO L413 NwaCegarLoop]: 911 mSDtfsCounter, 770 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:55,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 1596 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-03 02:41:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2022-11-03 02:41:55,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2414. [2022-11-03 02:41:55,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 1503 states have (on average 1.3872255489021956) internal successors, (2085), 1577 states have internal predecessors, (2085), 697 states have call successors, (697), 214 states have call predecessors, (697), 213 states have return successors, (691), 665 states have call predecessors, (691), 691 states have call successors, (691) [2022-11-03 02:41:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3473 transitions. [2022-11-03 02:41:55,248 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3473 transitions. Word has length 15 [2022-11-03 02:41:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:55,249 INFO L495 AbstractCegarLoop]: Abstraction has 2414 states and 3473 transitions. [2022-11-03 02:41:55,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:55,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3473 transitions. [2022-11-03 02:41:55,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:41:55,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:55,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:55,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:41:55,253 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:55,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:55,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1939993458, now seen corresponding path program 1 times [2022-11-03 02:41:55,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:55,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994637810] [2022-11-03 02:41:55,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:55,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:55,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:55,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994637810] [2022-11-03 02:41:55,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994637810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:55,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:55,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:41:55,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833323471] [2022-11-03 02:41:55,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:55,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:55,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:55,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:55,463 INFO L87 Difference]: Start difference. First operand 2414 states and 3473 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:58,386 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 02:42:00,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:00,908 INFO L93 Difference]: Finished difference Result 4594 states and 6600 transitions. [2022-11-03 02:42:00,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:00,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-03 02:42:00,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:00,926 INFO L225 Difference]: With dead ends: 4594 [2022-11-03 02:42:00,926 INFO L226 Difference]: Without dead ends: 2420 [2022-11-03 02:42:00,936 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 02:42:00,937 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 2 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:00,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1371 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 194 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-11-03 02:42:00,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2022-11-03 02:42:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2416. [2022-11-03 02:42:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1505 states have (on average 1.3867109634551495) internal successors, (2087), 1579 states have internal predecessors, (2087), 697 states have call successors, (697), 214 states have call predecessors, (697), 213 states have return successors, (691), 665 states have call predecessors, (691), 691 states have call successors, (691) [2022-11-03 02:42:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 3475 transitions. [2022-11-03 02:42:01,109 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 3475 transitions. Word has length 21 [2022-11-03 02:42:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:01,109 INFO L495 AbstractCegarLoop]: Abstraction has 2416 states and 3475 transitions. [2022-11-03 02:42:01,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:01,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 3475 transitions. [2022-11-03 02:42:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:42:01,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:01,112 INFO L195 NwaCegarLoop]: trace histogram [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 02:42:01,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:42:01,112 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:01,113 INFO L85 PathProgramCache]: Analyzing trace with hash 538183382, now seen corresponding path program 1 times [2022-11-03 02:42:01,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:01,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238192801] [2022-11-03 02:42:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:01,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:01,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:01,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238192801] [2022-11-03 02:42:01,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238192801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:01,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889734074] [2022-11-03 02:42:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:01,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:01,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:01,322 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:01,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:42:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:01,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:42:01,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:01,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:01,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889734074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:01,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:01,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-03 02:42:01,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554279238] [2022-11-03 02:42:01,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:01,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:01,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:01,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:01,862 INFO L87 Difference]: Start difference. First operand 2416 states and 3475 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:03,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:05,925 WARN L539 Checker$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 02:42:07,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:07,998 INFO L93 Difference]: Finished difference Result 4634 states and 6663 transitions. [2022-11-03 02:42:07,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:07,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-03 02:42:08,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:08,018 INFO L225 Difference]: With dead ends: 4634 [2022-11-03 02:42:08,018 INFO L226 Difference]: Without dead ends: 2458 [2022-11-03 02:42:08,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:08,026 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 11 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:08,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1376 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 199 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-11-03 02:42:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2022-11-03 02:42:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2422. [2022-11-03 02:42:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 1511 states have (on average 1.385175380542687) internal successors, (2093), 1585 states have internal predecessors, (2093), 697 states have call successors, (697), 214 states have call predecessors, (697), 213 states have return successors, (691), 665 states have call predecessors, (691), 691 states have call successors, (691) [2022-11-03 02:42:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 3481 transitions. [2022-11-03 02:42:08,169 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 3481 transitions. Word has length 24 [2022-11-03 02:42:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:08,170 INFO L495 AbstractCegarLoop]: Abstraction has 2422 states and 3481 transitions. [2022-11-03 02:42:08,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:08,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 3481 transitions. [2022-11-03 02:42:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:42:08,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:08,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 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 02:42:08,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:08,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:08,399 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:08,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:08,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1233921154, now seen corresponding path program 1 times [2022-11-03 02:42:08,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:08,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827768717] [2022-11-03 02:42:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:08,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:08,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:08,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827768717] [2022-11-03 02:42:08,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827768717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:08,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589794079] [2022-11-03 02:42:08,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:08,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:08,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:08,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:08,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:42:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:09,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:42:09,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:09,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:09,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589794079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:09,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:09,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-03 02:42:09,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60053610] [2022-11-03 02:42:09,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:09,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:09,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:09,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:09,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:09,195 INFO L87 Difference]: Start difference. First operand 2422 states and 3481 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:42:12,202 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 02:42:14,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:14,116 INFO L93 Difference]: Finished difference Result 5189 states and 7612 transitions. [2022-11-03 02:42:14,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:14,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-11-03 02:42:14,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:14,133 INFO L225 Difference]: With dead ends: 5189 [2022-11-03 02:42:14,133 INFO L226 Difference]: Without dead ends: 3007 [2022-11-03 02:42:14,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:14,146 INFO L413 NwaCegarLoop]: 873 mSDtfsCounter, 208 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:14,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1575 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 205 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 02:42:14,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2022-11-03 02:42:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 2458. [2022-11-03 02:42:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 1538 states have (on average 1.3862158647594278) internal successors, (2132), 1612 states have internal predecessors, (2132), 706 states have call successors, (706), 214 states have call predecessors, (706), 213 states have return successors, (700), 674 states have call predecessors, (700), 700 states have call successors, (700) [2022-11-03 02:42:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 3538 transitions. [2022-11-03 02:42:14,290 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 3538 transitions. Word has length 28 [2022-11-03 02:42:14,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:14,291 INFO L495 AbstractCegarLoop]: Abstraction has 2458 states and 3538 transitions. [2022-11-03 02:42:14,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:42:14,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 3538 transitions. [2022-11-03 02:42:14,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:42:14,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:14,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:42:14,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:14,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:42:14,511 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:14,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2124777271, now seen corresponding path program 1 times [2022-11-03 02:42:14,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:14,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280695509] [2022-11-03 02:42:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:14,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:14,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:14,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280695509] [2022-11-03 02:42:14,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280695509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:14,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279082450] [2022-11-03 02:42:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:14,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:14,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:14,664 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:14,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:42:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:15,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:42:15,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:42:15,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:15,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279082450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:15,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:15,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 02:42:15,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750468573] [2022-11-03 02:42:15,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:15,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:15,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:15,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:15,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:15,276 INFO L87 Difference]: Start difference. First operand 2458 states and 3538 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:17,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:20,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:20,098 INFO L93 Difference]: Finished difference Result 3757 states and 5385 transitions. [2022-11-03 02:42:20,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:20,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-11-03 02:42:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:20,120 INFO L225 Difference]: With dead ends: 3757 [2022-11-03 02:42:20,120 INFO L226 Difference]: Without dead ends: 3754 [2022-11-03 02:42:20,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:20,123 INFO L413 NwaCegarLoop]: 844 mSDtfsCounter, 745 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:20,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 1521 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 193 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-11-03 02:42:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2022-11-03 02:42:20,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3511. [2022-11-03 02:42:20,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 2191 states have (on average 1.382930168872661) internal successors, (3030), 2294 states have internal predecessors, (3030), 1010 states have call successors, (1010), 310 states have call predecessors, (1010), 309 states have return successors, (1004), 968 states have call predecessors, (1004), 1004 states have call successors, (1004) [2022-11-03 02:42:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 5044 transitions. [2022-11-03 02:42:20,345 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 5044 transitions. Word has length 34 [2022-11-03 02:42:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:20,345 INFO L495 AbstractCegarLoop]: Abstraction has 3511 states and 5044 transitions. [2022-11-03 02:42:20,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:20,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 5044 transitions. [2022-11-03 02:42:20,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 02:42:20,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:20,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:42:20,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:20,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:42:20,571 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:20,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:20,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1443236445, now seen corresponding path program 1 times [2022-11-03 02:42:20,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:20,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683676516] [2022-11-03 02:42:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:20,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:20,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:20,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683676516] [2022-11-03 02:42:20,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683676516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:20,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216499140] [2022-11-03 02:42:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:20,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:20,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:20,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:20,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:42:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:21,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:42:21,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:42:21,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:21,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216499140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:21,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:21,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 02:42:21,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429752057] [2022-11-03 02:42:21,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:21,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:21,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:21,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:21,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:21,358 INFO L87 Difference]: Start difference. First operand 3511 states and 5044 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:24,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:26,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:26,245 INFO L93 Difference]: Finished difference Result 3519 states and 5051 transitions. [2022-11-03 02:42:26,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:26,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-11-03 02:42:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:26,265 INFO L225 Difference]: With dead ends: 3519 [2022-11-03 02:42:26,265 INFO L226 Difference]: Without dead ends: 3516 [2022-11-03 02:42:26,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:26,268 INFO L413 NwaCegarLoop]: 844 mSDtfsCounter, 742 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:26,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 1524 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 193 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 02:42:26,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2022-11-03 02:42:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 3512. [2022-11-03 02:42:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3512 states, 2192 states have (on average 1.3827554744525548) internal successors, (3031), 2295 states have internal predecessors, (3031), 1010 states have call successors, (1010), 310 states have call predecessors, (1010), 309 states have return successors, (1004), 968 states have call predecessors, (1004), 1004 states have call successors, (1004) [2022-11-03 02:42:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3512 states to 3512 states and 5045 transitions. [2022-11-03 02:42:26,455 INFO L78 Accepts]: Start accepts. Automaton has 3512 states and 5045 transitions. Word has length 35 [2022-11-03 02:42:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:26,456 INFO L495 AbstractCegarLoop]: Abstraction has 3512 states and 5045 transitions. [2022-11-03 02:42:26,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3512 states and 5045 transitions. [2022-11-03 02:42:26,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:42:26,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:26,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:42:26,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 02:42:26,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:26,675 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1790312186, now seen corresponding path program 1 times [2022-11-03 02:42:26,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:26,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63983685] [2022-11-03 02:42:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:26,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:26,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:26,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63983685] [2022-11-03 02:42:26,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63983685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:26,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34397759] [2022-11-03 02:42:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:26,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:26,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:26,855 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:26,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:42:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:27,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:42:27,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:42:27,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:27,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34397759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:27,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:27,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 02:42:27,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300075887] [2022-11-03 02:42:27,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:27,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:27,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:27,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:27,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:27,449 INFO L87 Difference]: Start difference. First operand 3512 states and 5045 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:30,058 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 02:42:32,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:32,181 INFO L93 Difference]: Finished difference Result 3520 states and 5052 transitions. [2022-11-03 02:42:32,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:32,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2022-11-03 02:42:32,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:32,196 INFO L225 Difference]: With dead ends: 3520 [2022-11-03 02:42:32,196 INFO L226 Difference]: Without dead ends: 3517 [2022-11-03 02:42:32,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:32,199 INFO L413 NwaCegarLoop]: 845 mSDtfsCounter, 739 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:32,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 1528 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 193 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-03 02:42:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3517 states. [2022-11-03 02:42:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3517 to 3513. [2022-11-03 02:42:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 2193 states have (on average 1.3825809393524853) internal successors, (3032), 2296 states have internal predecessors, (3032), 1010 states have call successors, (1010), 310 states have call predecessors, (1010), 309 states have return successors, (1004), 968 states have call predecessors, (1004), 1004 states have call successors, (1004) [2022-11-03 02:42:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 5046 transitions. [2022-11-03 02:42:32,418 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 5046 transitions. Word has length 36 [2022-11-03 02:42:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:32,418 INFO L495 AbstractCegarLoop]: Abstraction has 3513 states and 5046 transitions. [2022-11-03 02:42:32,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 5046 transitions. [2022-11-03 02:42:32,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:42:32,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:32,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:42:32,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:32,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:32,646 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:32,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:32,647 INFO L85 PathProgramCache]: Analyzing trace with hash 148018104, now seen corresponding path program 1 times [2022-11-03 02:42:32,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:32,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989000812] [2022-11-03 02:42:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:32,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:32,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:32,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989000812] [2022-11-03 02:42:32,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989000812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:32,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966624832] [2022-11-03 02:42:32,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:32,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:32,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:32,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:32,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:42:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:33,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:42:33,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:42:33,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:33,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966624832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:33,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:33,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 02:42:33,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010884080] [2022-11-03 02:42:33,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:33,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:33,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:33,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:33,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:33,488 INFO L87 Difference]: Start difference. First operand 3513 states and 5046 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:34,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:36,769 WARN L539 Checker$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 02:42:37,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:37,712 INFO L93 Difference]: Finished difference Result 3515 states and 5047 transitions. [2022-11-03 02:42:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:37,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-11-03 02:42:37,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:37,732 INFO L225 Difference]: With dead ends: 3515 [2022-11-03 02:42:37,732 INFO L226 Difference]: Without dead ends: 3512 [2022-11-03 02:42:37,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:37,736 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 748 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:37,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 684 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 02:42:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3512 states. [2022-11-03 02:42:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3512 to 3512. [2022-11-03 02:42:37,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3512 states, 2193 states have (on average 1.382124943000456) internal successors, (3031), 2295 states have internal predecessors, (3031), 1009 states have call successors, (1009), 310 states have call predecessors, (1009), 309 states have return successors, (1004), 968 states have call predecessors, (1004), 1004 states have call successors, (1004) [2022-11-03 02:42:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3512 states to 3512 states and 5044 transitions. [2022-11-03 02:42:37,934 INFO L78 Accepts]: Start accepts. Automaton has 3512 states and 5044 transitions. Word has length 37 [2022-11-03 02:42:37,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:37,934 INFO L495 AbstractCegarLoop]: Abstraction has 3512 states and 5044 transitions. [2022-11-03 02:42:37,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:37,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3512 states and 5044 transitions. [2022-11-03 02:42:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:42:37,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:37,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:42:37,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 02:42:38,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:42:38,162 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:38,163 INFO L85 PathProgramCache]: Analyzing trace with hash -335236864, now seen corresponding path program 1 times [2022-11-03 02:42:38,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:38,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143591975] [2022-11-03 02:42:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:38,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:38,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:38,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143591975] [2022-11-03 02:42:38,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143591975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:38,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483524094] [2022-11-03 02:42:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:38,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:38,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:38,371 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:38,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:42:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:38,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:42:38,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:42:38,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:38,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483524094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:38,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:38,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 02:42:38,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558245607] [2022-11-03 02:42:38,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:38,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:38,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:38,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:38,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:38,995 INFO L87 Difference]: Start difference. First operand 3512 states and 5044 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:41,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:43,692 INFO L93 Difference]: Finished difference Result 5334 states and 7669 transitions. [2022-11-03 02:42:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:43,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-11-03 02:42:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:43,718 INFO L225 Difference]: With dead ends: 5334 [2022-11-03 02:42:43,718 INFO L226 Difference]: Without dead ends: 5310 [2022-11-03 02:42:43,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:43,721 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 719 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:43,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 1509 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 191 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-11-03 02:42:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5310 states. [2022-11-03 02:42:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5310 to 5292. [2022-11-03 02:42:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5292 states, 3297 states have (on average 1.3839854413102821) internal successors, (4563), 3460 states have internal predecessors, (4563), 1530 states have call successors, (1530), 469 states have call predecessors, (1530), 464 states have return successors, (1525), 1459 states have call predecessors, (1525), 1525 states have call successors, (1525) [2022-11-03 02:42:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5292 states to 5292 states and 7618 transitions. [2022-11-03 02:42:44,014 INFO L78 Accepts]: Start accepts. Automaton has 5292 states and 7618 transitions. Word has length 37 [2022-11-03 02:42:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:44,015 INFO L495 AbstractCegarLoop]: Abstraction has 5292 states and 7618 transitions. [2022-11-03 02:42:44,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 5292 states and 7618 transitions. [2022-11-03 02:42:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:42:44,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:44,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:42:44,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:44,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:44,234 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:44,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:44,235 INFO L85 PathProgramCache]: Analyzing trace with hash 293244412, now seen corresponding path program 1 times [2022-11-03 02:42:44,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:44,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577677255] [2022-11-03 02:42:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:44,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:44,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:44,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577677255] [2022-11-03 02:42:44,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577677255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:44,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565191090] [2022-11-03 02:42:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:44,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:44,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:44,501 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:44,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:42:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:45,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1424 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:42:45,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:42:45,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:45,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565191090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:45,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:45,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 02:42:45,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210718304] [2022-11-03 02:42:45,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:45,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:45,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:45,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:45,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:45,167 INFO L87 Difference]: Start difference. First operand 5292 states and 7618 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:47,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:48,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:48,607 INFO L93 Difference]: Finished difference Result 5294 states and 7619 transitions. [2022-11-03 02:42:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:48,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-11-03 02:42:48,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:48,632 INFO L225 Difference]: With dead ends: 5294 [2022-11-03 02:42:48,632 INFO L226 Difference]: Without dead ends: 5291 [2022-11-03 02:42:48,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:48,636 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 745 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:48,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 682 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-11-03 02:42:48,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2022-11-03 02:42:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 5291. [2022-11-03 02:42:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5291 states, 3297 states have (on average 1.383378829238702) internal successors, (4561), 3459 states have internal predecessors, (4561), 1529 states have call successors, (1529), 469 states have call predecessors, (1529), 464 states have return successors, (1525), 1459 states have call predecessors, (1525), 1525 states have call successors, (1525) [2022-11-03 02:42:48,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5291 states to 5291 states and 7615 transitions. [2022-11-03 02:42:48,914 INFO L78 Accepts]: Start accepts. Automaton has 5291 states and 7615 transitions. Word has length 38 [2022-11-03 02:42:48,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:48,914 INFO L495 AbstractCegarLoop]: Abstraction has 5291 states and 7615 transitions. [2022-11-03 02:42:48,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 5291 states and 7615 transitions. [2022-11-03 02:42:48,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:42:48,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:48,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:42:48,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:49,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:42:49,142 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:49,143 INFO L85 PathProgramCache]: Analyzing trace with hash 500297531, now seen corresponding path program 1 times [2022-11-03 02:42:49,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:49,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963302114] [2022-11-03 02:42:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:49,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:49,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:49,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963302114] [2022-11-03 02:42:49,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963302114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:49,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26185982] [2022-11-03 02:42:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:49,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:49,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:49,347 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:49,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:42:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:49,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:42:49,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:42:50,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:50,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26185982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:50,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:50,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 02:42:50,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716274035] [2022-11-03 02:42:50,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:50,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:50,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:50,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:50,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:50,012 INFO L87 Difference]: Start difference. First operand 5291 states and 7615 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:52,581 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 02:42:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:53,870 INFO L93 Difference]: Finished difference Result 5293 states and 7616 transitions. [2022-11-03 02:42:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:53,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-11-03 02:42:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:53,892 INFO L225 Difference]: With dead ends: 5293 [2022-11-03 02:42:53,893 INFO L226 Difference]: Without dead ends: 5271 [2022-11-03 02:42:53,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:53,897 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 742 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:53,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 680 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-11-03 02:42:53,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5271 states. [2022-11-03 02:42:54,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5271 to 5271. [2022-11-03 02:42:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5271 states, 3284 states have (on average 1.3821559074299634) internal successors, (4539), 3445 states have internal predecessors, (4539), 1525 states have call successors, (1525), 466 states have call predecessors, (1525), 461 states have return successors, (1522), 1456 states have call predecessors, (1522), 1522 states have call successors, (1522) [2022-11-03 02:42:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5271 states to 5271 states and 7586 transitions. [2022-11-03 02:42:54,275 INFO L78 Accepts]: Start accepts. Automaton has 5271 states and 7586 transitions. Word has length 39 [2022-11-03 02:42:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:54,277 INFO L495 AbstractCegarLoop]: Abstraction has 5271 states and 7586 transitions. [2022-11-03 02:42:54,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 5271 states and 7586 transitions. [2022-11-03 02:42:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:42:54,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:54,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:42:54,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:54,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:42:54,494 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:54,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:54,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1670985505, now seen corresponding path program 1 times [2022-11-03 02:42:54,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:54,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452811417] [2022-11-03 02:42:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:54,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:54,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:54,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452811417] [2022-11-03 02:42:54,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452811417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:54,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015748417] [2022-11-03 02:42:54,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:54,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:54,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:54,686 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:54,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:42:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:55,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:42:55,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:42:55,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:55,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015748417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:55,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:55,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 02:42:55,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66317656] [2022-11-03 02:42:55,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:55,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:55,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:55,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:55,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:55,372 INFO L87 Difference]: Start difference. First operand 5271 states and 7586 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:58,104 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 02:42:59,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:59,298 INFO L93 Difference]: Finished difference Result 5273 states and 7587 transitions. [2022-11-03 02:42:59,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:59,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-11-03 02:42:59,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:59,320 INFO L225 Difference]: With dead ends: 5273 [2022-11-03 02:42:59,320 INFO L226 Difference]: Without dead ends: 5241 [2022-11-03 02:42:59,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:59,325 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 714 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:59,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 691 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 02:42:59,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5241 states. [2022-11-03 02:42:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5241 to 4224. [2022-11-03 02:42:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4224 states, 2633 states have (on average 1.3813140903911887) internal successors, (3637), 2756 states have internal predecessors, (3637), 1220 states have call successors, (1220), 371 states have call predecessors, (1220), 370 states have return successors, (1219), 1174 states have call predecessors, (1219), 1219 states have call successors, (1219) [2022-11-03 02:42:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 6076 transitions. [2022-11-03 02:42:59,634 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 6076 transitions. Word has length 40 [2022-11-03 02:42:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:59,635 INFO L495 AbstractCegarLoop]: Abstraction has 4224 states and 6076 transitions. [2022-11-03 02:42:59,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:42:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 6076 transitions. [2022-11-03 02:42:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:42:59,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:59,640 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:42:59,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:59,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:59,854 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:59,855 INFO L85 PathProgramCache]: Analyzing trace with hash 567019490, now seen corresponding path program 1 times [2022-11-03 02:42:59,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:59,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221479005] [2022-11-03 02:42:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:59,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:43:00,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:00,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221479005] [2022-11-03 02:43:00,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221479005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:00,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42236561] [2022-11-03 02:43:00,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:00,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:00,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:00,023 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:00,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a36cf75e-31a5-480d-91b2-042d47b33b3a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:43:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:00,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:43:00,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:43:00,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:43:00,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42236561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:00,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [521276369] [2022-11-03 02:43:00,709 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-03 02:43:00,709 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:43:00,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:43:00,718 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:43:00,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:43:02,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 402 treesize of output 338 [2022-11-03 02:43:02,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:02,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 231 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 0 case distinctions, treesize of input 1018 treesize of output 872 [2022-11-03 02:43:03,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 374 [2022-11-03 02:43:11,532 INFO L244 Elim1Store]: Index analysis took 152 ms [2022-11-03 02:43:14,553 INFO L356 Elim1Store]: treesize reduction 650, result has 47.4 percent of original size [2022-11-03 02:43:14,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 65 select indices, 65 select index equivalence classes, 2081 disjoint index pairs (out of 2080 index pairs), introduced 65 new quantified variables, introduced 65 case distinctions, treesize of input 332 treesize of output 786 [2022-11-03 02:43:15,606 INFO L244 Elim1Store]: Index analysis took 243 ms [2022-11-03 02:43:19,673 INFO L356 Elim1Store]: treesize reduction 1170, result has 33.4 percent of original size [2022-11-03 02:43:19,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 67 select indices, 67 select index equivalence classes, 2146 disjoint index pairs (out of 2211 index pairs), introduced 67 new quantified variables, introduced 130 case distinctions, treesize of input 342 treesize of output 797 [2022-11-03 02:43:31,526 INFO L244 Elim1Store]: Index analysis took 118 ms [2022-11-03 02:43:38,206 WARN L234 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 858 DAG size of output: 269 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:43:38,208 INFO L356 Elim1Store]: treesize reduction 1440, result has 18.9 percent of original size [2022-11-03 02:43:38,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 66 select indices, 66 select index equivalence classes, 2081 disjoint index pairs (out of 2145 index pairs), introduced 66 new quantified variables, introduced 131 case distinctions, treesize of input 6909 treesize of output 6980 [2022-11-03 02:43:39,886 INFO L244 Elim1Store]: Index analysis took 161 ms [2022-11-03 02:43:47,288 WARN L234 SmtUtils]: Spent 7.38s on a formula simplification. DAG size of input: 996 DAG size of output: 273 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:43:47,289 INFO L356 Elim1Store]: treesize reduction 1968, result has 14.8 percent of original size [2022-11-03 02:43:47,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 68 select indices, 68 select index equivalence classes, 2146 disjoint index pairs (out of 2278 index pairs), introduced 68 new quantified variables, introduced 198 case distinctions, treesize of input 6912 treesize of output 6990 [2022-11-03 02:44:28,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:44:29,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:44:30,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:44:30,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:44:53,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-03 02:44:57,802 INFO L244 Elim1Store]: Index analysis took 140 ms [2022-11-03 02:45:01,101 INFO L356 Elim1Store]: treesize reduction 650, result has 47.4 percent of original size [2022-11-03 02:45:01,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 65 select indices, 65 select index equivalence classes, 2081 disjoint index pairs (out of 2080 index pairs), introduced 65 new quantified variables, introduced 65 case distinctions, treesize of input 332 treesize of output 786 [2022-11-03 02:45:02,446 INFO L244 Elim1Store]: Index analysis took 217 ms [2022-11-03 02:45:06,870 INFO L356 Elim1Store]: treesize reduction 1170, result has 33.4 percent of original size [2022-11-03 02:45:06,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 67 select indices, 67 select index equivalence classes, 2146 disjoint index pairs (out of 2211 index pairs), introduced 67 new quantified variables, introduced 130 case distinctions, treesize of input 342 treesize of output 797 [2022-11-03 02:45:17,458 INFO L244 Elim1Store]: Index analysis took 113 ms [2022-11-03 02:45:28,492 WARN L234 SmtUtils]: Spent 11.02s on a formula simplification. DAG size of input: 996 DAG size of output: 403 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:45:28,493 INFO L356 Elim1Store]: treesize reduction 1708, result has 26.1 percent of original size [2022-11-03 02:45:28,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 68 select indices, 68 select index equivalence classes, 2146 disjoint index pairs (out of 2278 index pairs), introduced 68 new quantified variables, introduced 198 case distinctions, treesize of input 6914 treesize of output 7252 [2022-11-03 02:45:30,130 INFO L244 Elim1Store]: Index analysis took 144 ms [2022-11-03 02:45:30,751 INFO L356 Elim1Store]: treesize reduction 531, result has 1.7 percent of original size [2022-11-03 02:45:30,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 66 select indices, 66 select index equivalence classes, 2146 disjoint index pairs (out of 2145 index pairs), introduced 66 new quantified variables, introduced 66 case distinctions, treesize of input 6907 treesize of output 6978 [2022-11-03 02:46:05,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:46:06,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:46:06,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:46:06,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:46:07,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:46:07,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:46:22,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-03 02:46:44,526 INFO L197 IcfgInterpreter]: Interpreting procedure put_disk with input of size 217 for LOIs [2022-11-03 02:46:44,552 INFO L197 IcfgInterpreter]: Interpreting procedure pi_init with input of size 275 for LOIs [2022-11-03 02:46:44,674 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:46:57,946 WARN L234 SmtUtils]: Spent 13.16s on a formula simplification that was a NOOP. DAG size: 1354 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:11,333 WARN L234 SmtUtils]: Spent 13.23s on a formula simplification that was a NOOP. DAG size: 1367 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:48:32,419 WARN L234 SmtUtils]: Spent 1.33m on a formula simplification. DAG size of input: 1564 DAG size of output: 1368 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:48:45,893 WARN L234 SmtUtils]: Spent 13.22s on a formula simplification that was a NOOP. DAG size: 1357 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:50:46,155 WARN L234 SmtUtils]: Spent 1.96m on a formula simplification. DAG size of input: 1567 DAG size of output: 1397 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:50:59,955 WARN L234 SmtUtils]: Spent 13.08s on a formula simplification that was a NOOP. DAG size: 1372 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:51:13,576 WARN L234 SmtUtils]: Spent 12.86s on a formula simplification that was a NOOP. DAG size: 1360 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:51:36,807 WARN L234 SmtUtils]: Spent 6.63s on a formula simplification. DAG size of input: 484 DAG size of output: 366 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:52:22,739 WARN L234 SmtUtils]: Spent 13.21s on a formula simplification that was a NOOP. DAG size: 1371 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:52:36,981 WARN L234 SmtUtils]: Spent 13.19s on a formula simplification that was a NOOP. DAG size: 1373 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:52:51,052 WARN L234 SmtUtils]: Spent 12.94s on a formula simplification that was a NOOP. DAG size: 1357 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:52:51,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [521276369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:51,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:52:51,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [4, 4, 4] total 34 [2022-11-03 02:52:51,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456488752] [2022-11-03 02:52:51,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:51,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 02:52:51,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:51,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 02:52:51,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:52:51,060 INFO L87 Difference]: Start difference. First operand 4224 states and 6076 transitions. Second operand has 29 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:53:21,220 WARN L234 SmtUtils]: Spent 26.56s on a formula simplification. DAG size of input: 1374 DAG size of output: 1369 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:53:48,848 WARN L234 SmtUtils]: Spent 27.03s on a formula simplification. DAG size of input: 1386 DAG size of output: 1382 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:53:50,887 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 02:54:19,158 WARN L234 SmtUtils]: Spent 27.84s on a formula simplification. DAG size of input: 1389 DAG size of output: 1385 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:54:47,264 WARN L234 SmtUtils]: Spent 27.14s on a formula simplification. DAG size of input: 1384 DAG size of output: 1379 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)