./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--wireless--rtl818x--rtl8180--rtl818x_pci.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--wireless--rtl818x--rtl8180--rtl818x_pci.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V --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 73e11d79da89f19153d89e853a8d4a3607f25d95ae579da9c148a59839e48ce3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:30:03,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:30:03,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:30:03,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:30:03,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:30:03,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:30:03,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:30:03,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:30:03,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:30:03,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:30:03,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:30:03,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:30:03,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:30:03,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:30:03,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:30:03,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:30:03,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:30:03,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:30:03,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:30:03,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:30:03,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:30:03,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:30:03,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:30:03,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:30:03,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:30:03,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:30:03,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:30:03,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:30:03,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:30:03,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:30:03,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:30:03,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:30:03,857 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:30:03,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:30:03,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:30:03,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:30:03,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:30:03,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:30:03,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:30:03,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:30:03,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:30:03,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:30:03,911 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:30:03,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:30:03,912 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:30:03,913 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:30:03,914 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:30:03,920 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:30:03,920 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:30:03,921 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:30:03,921 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:30:03,921 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:30:03,922 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:30:03,922 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:30:03,923 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:30:03,923 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:30:03,923 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:30:03,923 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:30:03,924 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:30:03,924 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:30:03,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:30:03,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:30:03,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:30:03,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:30:03,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:30:03,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:30:03,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:30:03,926 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:30:03,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:30:03,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:30:03,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:30:03,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:30:03,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:30:03,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:30:03,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:30:03,930 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:30:03,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:30:03,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:30:03,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:30:03,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:30:03,931 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73e11d79da89f19153d89e853a8d4a3607f25d95ae579da9c148a59839e48ce3 [2021-11-23 03:30:04,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:30:04,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:30:04,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:30:04,304 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:30:04,305 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:30:04,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--wireless--rtl818x--rtl8180--rtl818x_pci.ko-entry_point.cil.out.i [2021-11-23 03:30:04,384 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/data/ba07ba136/7bfee4a0e6854bcf90958da2d9320b41/FLAG858cc45b3 [2021-11-23 03:30:05,541 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:30:05,542 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--wireless--rtl818x--rtl8180--rtl818x_pci.ko-entry_point.cil.out.i [2021-11-23 03:30:05,655 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/data/ba07ba136/7bfee4a0e6854bcf90958da2d9320b41/FLAG858cc45b3 [2021-11-23 03:30:05,750 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/data/ba07ba136/7bfee4a0e6854bcf90958da2d9320b41 [2021-11-23 03:30:05,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:30:05,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:30:05,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:30:05,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:30:05,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:30:05,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:30:05" (1/1) ... [2021-11-23 03:30:05,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27c1f0ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:05, skipping insertion in model container [2021-11-23 03:30:05,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:30:05" (1/1) ... [2021-11-23 03:30:05,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:30:05,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:30:09,726 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_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--wireless--rtl818x--rtl8180--rtl818x_pci.ko-entry_point.cil.out.i[468644,468657] [2021-11-23 03:30:09,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:30:09,917 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:30:10,391 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_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--wireless--rtl818x--rtl8180--rtl818x_pci.ko-entry_point.cil.out.i[468644,468657] [2021-11-23 03:30:10,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:30:10,606 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:30:10,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:10 WrapperNode [2021-11-23 03:30:10,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:30:10,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:30:10,608 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:30:10,608 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:30:10,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:10" (1/1) ... [2021-11-23 03:30:10,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:10" (1/1) ... [2021-11-23 03:30:11,116 INFO L137 Inliner]: procedures = 440, calls = 4514, calls flagged for inlining = 181, calls inlined = 178, statements flattened = 8251 [2021-11-23 03:30:11,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:30:11,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:30:11,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:30:11,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:30:11,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:10" (1/1) ... [2021-11-23 03:30:11,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:10" (1/1) ... [2021-11-23 03:30:11,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:10" (1/1) ... [2021-11-23 03:30:11,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:10" (1/1) ... [2021-11-23 03:30:11,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:10" (1/1) ... [2021-11-23 03:30:11,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:10" (1/1) ... [2021-11-23 03:30:11,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:10" (1/1) ... [2021-11-23 03:30:11,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:30:11,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:30:11,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:30:11,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:30:11,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:10" (1/1) ... [2021-11-23 03:30:11,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:30:11,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:30:11,755 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:30:11,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:30:11,833 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_ioread8 [2021-11-23 03:30:11,833 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_ioread8 [2021-11-23 03:30:11,833 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_frequency_to_channel [2021-11-23 03:30:11,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_frequency_to_channel [2021-11-23 03:30:11,834 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_free_tx_ring [2021-11-23 03:30:11,834 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_free_tx_ring [2021-11-23 03:30:11,834 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_iowrite8 [2021-11-23 03:30:11,834 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_iowrite8 [2021-11-23 03:30:11,834 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-23 03:30:11,835 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-23 03:30:11,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 03:30:11,835 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 03:30:11,835 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-23 03:30:11,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-23 03:30:11,836 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:30:11,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:30:11,836 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_rf_init [2021-11-23 03:30:11,836 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_rf_init [2021-11-23 03:30:11,836 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_rf_calc_rssi [2021-11-23 03:30:11,836 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_rf_calc_rssi [2021-11-23 03:30:11,837 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8187se_rf_writereg [2021-11-23 03:30:11,837 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8187se_rf_writereg [2021-11-23 03:30:11,837 INFO L130 BoogieDeclarations]: Found specification of procedure usleep_range [2021-11-23 03:30:11,837 INFO L138 BoogieDeclarations]: Found implementation of procedure usleep_range [2021-11-23 03:30:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_generic_frame_duration [2021-11-23 03:30:11,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_generic_frame_duration [2021-11-23 03:30:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_3 [2021-11-23 03:30:11,853 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_3 [2021-11-23 03:30:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 03:30:11,854 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 03:30:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure fls [2021-11-23 03:30:11,854 INFO L138 BoogieDeclarations]: Found implementation of procedure fls [2021-11-23 03:30:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-23 03:30:11,854 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-23 03:30:11,855 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 03:30:11,855 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 03:30:11,855 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_write_phy_antenna [2021-11-23 03:30:11,855 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_write_phy_antenna [2021-11-23 03:30:11,855 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_rf_init [2021-11-23 03:30:11,855 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_rf_init [2021-11-23 03:30:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_ioread32 [2021-11-23 03:30:11,856 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_ioread32 [2021-11-23 03:30:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_free_rx_ring [2021-11-23 03:30:11,856 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_free_rx_ring [2021-11-23 03:30:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_bss_info_changed [2021-11-23 03:30:11,856 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_bss_info_changed [2021-11-23 03:30:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure grf5101_rf_calc_rssi [2021-11-23 03:30:11,857 INFO L138 BoogieDeclarations]: Found implementation of procedure grf5101_rf_calc_rssi [2021-11-23 03:30:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 03:30:11,857 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 03:30:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-23 03:30:11,857 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-23 03:30:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:30:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225z2_rf_set_tx_power [2021-11-23 03:30:11,858 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225z2_rf_set_tx_power [2021-11-23 03:30:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_ioread16 [2021-11-23 03:30:11,858 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_ioread16 [2021-11-23 03:30:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 03:30:11,858 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 03:30:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_set_anaparam [2021-11-23 03:30:11,858 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_set_anaparam [2021-11-23 03:30:11,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 03:30:11,859 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_get_tx_rate [2021-11-23 03:30:11,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_get_tx_rate [2021-11-23 03:30:11,859 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 03:30:11,859 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 03:30:11,859 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 03:30:11,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 03:30:11,859 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_rf_stop [2021-11-23 03:30:11,860 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_rf_stop [2021-11-23 03:30:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 03:30:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_rf_stop [2021-11-23 03:30:11,860 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_rf_stop [2021-11-23 03:30:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure pci_zalloc_consistent [2021-11-23 03:30:11,860 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_zalloc_consistent [2021-11-23 03:30:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:30:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_resume_early_10 [2021-11-23 03:30:11,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_resume_early_10 [2021-11-23 03:30:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-23 03:30:11,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-23 03:30:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_get_tsf [2021-11-23 03:30:11,861 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_get_tsf [2021-11-23 03:30:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 03:30:11,861 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 03:30:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_2 [2021-11-23 03:30:11,861 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_2 [2021-11-23 03:30:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-23 03:30:11,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-23 03:30:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iomap [2021-11-23 03:30:11,862 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iomap [2021-11-23 03:30:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_add_interface [2021-11-23 03:30:11,862 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_add_interface [2021-11-23 03:30:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_write_phy_antenna [2021-11-23 03:30:11,862 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_write_phy_antenna [2021-11-23 03:30:11,863 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-23 03:30:11,863 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-23 03:30:11,863 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-23 03:30:11,863 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-23 03:30:11,863 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_rf_set_channel [2021-11-23 03:30:11,863 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_rf_set_channel [2021-11-23 03:30:11,863 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_rf_set_tx_power [2021-11-23 03:30:11,863 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_rf_set_tx_power [2021-11-23 03:30:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_rf_set_channel [2021-11-23 03:30:11,864 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_rf_set_channel [2021-11-23 03:30:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 03:30:11,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 03:30:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2021-11-23 03:30:11,864 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2021-11-23 03:30:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:30:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:30:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-23 03:30:11,865 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-23 03:30:11,865 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_free_hw [2021-11-23 03:30:11,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_free_hw [2021-11-23 03:30:11,865 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_write_phy_cck [2021-11-23 03:30:11,865 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_write_phy_cck [2021-11-23 03:30:11,865 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 03:30:11,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 03:30:11,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:30:11,866 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:30:11,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:30:11,866 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_shutdown_10 [2021-11-23 03:30:11,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_shutdown_10 [2021-11-23 03:30:11,866 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_get_rts_cts_rate [2021-11-23 03:30:11,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_get_rts_cts_rate [2021-11-23 03:30:11,866 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225se_rf_init [2021-11-23 03:30:11,866 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225se_rf_init [2021-11-23 03:30:11,867 INFO L130 BoogieDeclarations]: Found specification of procedure grf5101_rf_set_channel [2021-11-23 03:30:11,867 INFO L138 BoogieDeclarations]: Found implementation of procedure grf5101_rf_set_channel [2021-11-23 03:30:11,867 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_resume [2021-11-23 03:30:11,867 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_resume [2021-11-23 03:30:11,867 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_set_anaparam2 [2021-11-23 03:30:11,867 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_set_anaparam2 [2021-11-23 03:30:11,867 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_write_phy_ofdm [2021-11-23 03:30:11,867 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_write_phy_ofdm [2021-11-23 03:30:11,868 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_rf_calc_rssi [2021-11-23 03:30:11,868 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_rf_calc_rssi [2021-11-23 03:30:11,868 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_write_phy [2021-11-23 03:30:11,868 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_write_phy [2021-11-23 03:30:11,868 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_conf_basic_rates [2021-11-23 03:30:11,868 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_conf_basic_rates [2021-11-23 03:30:11,870 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2021-11-23 03:30:11,870 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2021-11-23 03:30:11,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:30:11,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:30:11,871 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 03:30:11,871 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 03:30:11,871 INFO L130 BoogieDeclarations]: Found specification of procedure write_sa2400 [2021-11-23 03:30:11,871 INFO L138 BoogieDeclarations]: Found implementation of procedure write_sa2400 [2021-11-23 03:30:11,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 03:30:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:30:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_conf_tx [2021-11-23 03:30:11,872 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_conf_tx [2021-11-23 03:30:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 03:30:11,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 03:30:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_stop [2021-11-23 03:30:11,873 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_stop [2021-11-23 03:30:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-23 03:30:11,873 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-23 03:30:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_5 [2021-11-23 03:30:11,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_5 [2021-11-23 03:30:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_4 [2021-11-23 03:30:11,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_4 [2021-11-23 03:30:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_9 [2021-11-23 03:30:11,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_9 [2021-11-23 03:30:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_8 [2021-11-23 03:30:11,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_8 [2021-11-23 03:30:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_rf_init [2021-11-23 03:30:11,874 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_rf_init [2021-11-23 03:30:11,875 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_7 [2021-11-23 03:30:11,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_7 [2021-11-23 03:30:11,875 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_6 [2021-11-23 03:30:11,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_6 [2021-11-23 03:30:11,875 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225z2_rf_init [2021-11-23 03:30:11,875 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225z2_rf_init [2021-11-23 03:30:11,876 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_remove [2021-11-23 03:30:11,876 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_remove [2021-11-23 03:30:11,876 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225se_rf_set_channel [2021-11-23 03:30:11,876 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225se_rf_set_channel [2021-11-23 03:30:11,876 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:30:11,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:30:11,876 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work_on [2021-11-23 03:30:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work_on [2021-11-23 03:30:11,877 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-23 03:30:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-23 03:30:11,877 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_rf_stop [2021-11-23 03:30:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_rf_stop [2021-11-23 03:30:11,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 03:30:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 03:30:11,878 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_2 [2021-11-23 03:30:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_2 [2021-11-23 03:30:11,878 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:30:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:30:11,878 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_int_disable [2021-11-23 03:30:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_int_disable [2021-11-23 03:30:11,879 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_write [2021-11-23 03:30:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_write [2021-11-23 03:30:11,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:30:11,879 INFO L130 BoogieDeclarations]: Found specification of procedure grf5101_write_phy_antenna [2021-11-23 03:30:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure grf5101_write_phy_antenna [2021-11-23 03:30:11,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:30:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225se_rf_stop [2021-11-23 03:30:11,880 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225se_rf_stop [2021-11-23 03:30:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-23 03:30:11,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-23 03:30:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:30:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure grf5101_rf_init [2021-11-23 03:30:11,881 INFO L138 BoogieDeclarations]: Found implementation of procedure grf5101_rf_init [2021-11-23 03:30:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2021-11-23 03:30:11,881 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2021-11-23 03:30:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-23 03:30:11,881 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-23 03:30:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure _ieee80211_hw_set [2021-11-23 03:30:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure _ieee80211_hw_set [2021-11-23 03:30:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure write_max2820 [2021-11-23 03:30:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure write_max2820 [2021-11-23 03:30:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure write_grf5101 [2021-11-23 03:30:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure write_grf5101 [2021-11-23 03:30:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8187se_rf_readreg [2021-11-23 03:30:11,883 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8187se_rf_readreg [2021-11-23 03:30:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_beacon_work [2021-11-23 03:30:11,883 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_beacon_work [2021-11-23 03:30:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_remove_interface [2021-11-23 03:30:11,883 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_remove_interface [2021-11-23 03:30:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_mapping_error [2021-11-23 03:30:11,884 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_mapping_error [2021-11-23 03:30:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_read [2021-11-23 03:30:11,884 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_read [2021-11-23 03:30:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_handle_rx [2021-11-23 03:30:11,884 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_handle_rx [2021-11-23 03:30:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_rf_set_channel [2021-11-23 03:30:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_rf_set_channel [2021-11-23 03:30:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:30:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure eeprom_93cx6_read [2021-11-23 03:30:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure eeprom_93cx6_read [2021-11-23 03:30:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure dev_alloc_skb [2021-11-23 03:30:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_alloc_skb [2021-11-23 03:30:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:30:11,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:30:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_handle_tx [2021-11-23 03:30:11,886 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_handle_tx [2021-11-23 03:30:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_configure_filter [2021-11-23 03:30:11,886 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_configure_filter [2021-11-23 03:30:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8187se_conf_ac_parm [2021-11-23 03:30:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8187se_conf_ac_parm [2021-11-23 03:30:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 03:30:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 03:30:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-23 03:30:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-23 03:30:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_2 [2021-11-23 03:30:11,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_2 [2021-11-23 03:30:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure grf5101_rf_stop [2021-11-23 03:30:11,888 INFO L138 BoogieDeclarations]: Found implementation of procedure grf5101_rf_stop [2021-11-23 03:30:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_len [2021-11-23 03:30:11,888 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_len [2021-11-23 03:30:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_prepare_multicast [2021-11-23 03:30:11,889 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_prepare_multicast [2021-11-23 03:30:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2021-11-23 03:30:11,889 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2021-11-23 03:30:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-23 03:30:11,889 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-23 03:30:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_iowrite32 [2021-11-23 03:30:11,890 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_iowrite32 [2021-11-23 03:30:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure eeprom_93cx6_multiread [2021-11-23 03:30:11,890 INFO L138 BoogieDeclarations]: Found implementation of procedure eeprom_93cx6_multiread [2021-11-23 03:30:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:30:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_config [2021-11-23 03:30:11,890 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_config [2021-11-23 03:30:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8187se_three_wire_io [2021-11-23 03:30:11,891 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8187se_three_wire_io [2021-11-23 03:30:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_tx [2021-11-23 03:30:11,891 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_tx [2021-11-23 03:30:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_iowrite16 [2021-11-23 03:30:11,891 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_iowrite16 [2021-11-23 03:30:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure IEEE80211_SKB_CB [2021-11-23 03:30:11,892 INFO L138 BoogieDeclarations]: Found implementation of procedure IEEE80211_SKB_CB [2021-11-23 03:30:12,980 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:30:12,984 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:30:13,519 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 03:30:22,061 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:30:24,267 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:30:24,268 INFO L301 CfgBuilder]: Removed 78 assume(true) statements. [2021-11-23 03:30:24,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:30:24 BoogieIcfgContainer [2021-11-23 03:30:24,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:30:24,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:30:24,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:30:24,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:30:24,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:30:05" (1/3) ... [2021-11-23 03:30:24,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e0c48c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:30:24, skipping insertion in model container [2021-11-23 03:30:24,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:10" (2/3) ... [2021-11-23 03:30:24,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e0c48c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:30:24, skipping insertion in model container [2021-11-23 03:30:24,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:30:24" (3/3) ... [2021-11-23 03:30:24,287 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--wireless--rtl818x--rtl8180--rtl818x_pci.ko-entry_point.cil.out.i [2021-11-23 03:30:24,293 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:30:24,293 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:30:24,368 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:30:24,377 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:30:24,377 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:30:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 3264 states, 1674 states have (on average 1.3088410991636799) internal successors, (2191), 1829 states have internal predecessors, (2191), 1537 states have call successors, (1537), 130 states have call predecessors, (1537), 129 states have return successors, (1522), 1485 states have call predecessors, (1522), 1522 states have call successors, (1522) [2021-11-23 03:30:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-23 03:30:24,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:24,499 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:24,500 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:24,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:24,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1011026581, now seen corresponding path program 1 times [2021-11-23 03:30:24,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:24,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623237463] [2021-11-23 03:30:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:24,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2021-11-23 03:30:25,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:25,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623237463] [2021-11-23 03:30:25,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623237463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:25,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:25,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:30:25,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583295805] [2021-11-23 03:30:25,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:25,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:30:25,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:25,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:30:25,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:25,538 INFO L87 Difference]: Start difference. First operand has 3264 states, 1674 states have (on average 1.3088410991636799) internal successors, (2191), 1829 states have internal predecessors, (2191), 1537 states have call successors, (1537), 130 states have call predecessors, (1537), 129 states have return successors, (1522), 1485 states have call predecessors, (1522), 1522 states have call successors, (1522) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-23 03:30:27,036 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:30,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:32,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:30:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:33,595 INFO L93 Difference]: Finished difference Result 8569 states and 13859 transitions. [2021-11-23 03:30:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:30:33,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 212 [2021-11-23 03:30:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:33,703 INFO L225 Difference]: With dead ends: 8569 [2021-11-23 03:30:33,703 INFO L226 Difference]: Without dead ends: 5303 [2021-11-23 03:30:33,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:33,747 INFO L933 BasicCegarLoop]: 6237 mSDtfsCounter, 3733 mSDsluCounter, 4658 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3734 SdHoareTripleChecker+Valid, 10651 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:33,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3734 Valid, 10651 Invalid, 617 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4 Valid, 611 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2021-11-23 03:30:33,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5303 states. [2021-11-23 03:30:34,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5303 to 5299. [2021-11-23 03:30:34,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5299 states, 2457 states have (on average 1.2938542938542938) internal successors, (3179), 2568 states have internal predecessors, (3179), 2606 states have call successors, (2606), 236 states have call predecessors, (2606), 235 states have return successors, (2606), 2552 states have call predecessors, (2606), 2605 states have call successors, (2606) [2021-11-23 03:30:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5299 states to 5299 states and 8391 transitions. [2021-11-23 03:30:34,621 INFO L78 Accepts]: Start accepts. Automaton has 5299 states and 8391 transitions. Word has length 212 [2021-11-23 03:30:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:34,625 INFO L470 AbstractCegarLoop]: Abstraction has 5299 states and 8391 transitions. [2021-11-23 03:30:34,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-23 03:30:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 5299 states and 8391 transitions. [2021-11-23 03:30:34,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-23 03:30:34,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:34,649 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:34,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:30:34,650 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:34,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:34,651 INFO L85 PathProgramCache]: Analyzing trace with hash 541237849, now seen corresponding path program 1 times [2021-11-23 03:30:34,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:34,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454214936] [2021-11-23 03:30:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:34,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:34,881 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:30:34,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841055830] [2021-11-23 03:30:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:34,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:30:34,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:30:34,886 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:30:34,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:30:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:36,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 5430 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:30:36,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:30:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-11-23 03:30:37,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:30:37,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:37,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454214936] [2021-11-23 03:30:37,316 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:30:37,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841055830] [2021-11-23 03:30:37,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841055830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:37,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:37,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:30:37,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063325234] [2021-11-23 03:30:37,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:37,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:30:37,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:37,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:30:37,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:30:37,325 INFO L87 Difference]: Start difference. First operand 5299 states and 8391 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:30:42,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:44,309 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:47,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:30:48,962 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:50,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:50,403 INFO L93 Difference]: Finished difference Result 15843 states and 25098 transitions. [2021-11-23 03:30:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:30:50,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 251 [2021-11-23 03:30:50,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:50,540 INFO L225 Difference]: With dead ends: 15843 [2021-11-23 03:30:50,541 INFO L226 Difference]: Without dead ends: 10581 [2021-11-23 03:30:50,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:30:50,604 INFO L933 BasicCegarLoop]: 5946 mSDtfsCounter, 4662 mSDsluCounter, 17056 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4669 SdHoareTripleChecker+Valid, 22257 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:50,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4669 Valid, 22257 Invalid, 1029 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1024 Invalid, 2 Unknown, 0 Unchecked, 12.4s Time] [2021-11-23 03:30:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10581 states. [2021-11-23 03:30:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10581 to 10562. [2021-11-23 03:30:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10562 states, 4903 states have (on average 1.2951254334081175) internal successors, (6350), 5124 states have internal predecessors, (6350), 5187 states have call successors, (5187), 472 states have call predecessors, (5187), 471 states have return successors, (5191), 5079 states have call predecessors, (5191), 5186 states have call successors, (5191) [2021-11-23 03:30:52,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10562 states to 10562 states and 16728 transitions. [2021-11-23 03:30:52,047 INFO L78 Accepts]: Start accepts. Automaton has 10562 states and 16728 transitions. Word has length 251 [2021-11-23 03:30:52,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:52,049 INFO L470 AbstractCegarLoop]: Abstraction has 10562 states and 16728 transitions. [2021-11-23 03:30:52,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:30:52,050 INFO L276 IsEmpty]: Start isEmpty. Operand 10562 states and 16728 transitions. [2021-11-23 03:30:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-23 03:30:52,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:52,061 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:52,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:30:52,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:30:52,285 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:52,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:52,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1701224050, now seen corresponding path program 1 times [2021-11-23 03:30:52,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:52,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705208405] [2021-11-23 03:30:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:52,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:52,498 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:30:52,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088669553] [2021-11-23 03:30:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:52,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:30:52,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:30:52,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:30:52,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:30:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:54,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 5432 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:30:54,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:30:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-11-23 03:30:54,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:30:54,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:54,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705208405] [2021-11-23 03:30:54,696 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:30:54,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088669553] [2021-11-23 03:30:54,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088669553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:54,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:54,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:30:54,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761411219] [2021-11-23 03:30:54,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:54,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:30:54,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:30:54,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:30:54,699 INFO L87 Difference]: Start difference. First operand 10562 states and 16728 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:30:57,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:02,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:04,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:31:06,545 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:08,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:08,102 INFO L93 Difference]: Finished difference Result 21130 states and 33459 transitions. [2021-11-23 03:31:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:31:08,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 252 [2021-11-23 03:31:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:08,236 INFO L225 Difference]: With dead ends: 21130 [2021-11-23 03:31:08,237 INFO L226 Difference]: Without dead ends: 10605 [2021-11-23 03:31:08,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:31:08,327 INFO L933 BasicCegarLoop]: 5946 mSDtfsCounter, 4661 mSDsluCounter, 17056 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4668 SdHoareTripleChecker+Valid, 22257 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:08,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4668 Valid, 22257 Invalid, 1029 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1024 Invalid, 2 Unknown, 0 Unchecked, 12.7s Time] [2021-11-23 03:31:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10605 states. [2021-11-23 03:31:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10605 to 10580. [2021-11-23 03:31:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10580 states, 4919 states have (on average 1.2949786541980077) internal successors, (6370), 5140 states have internal predecessors, (6370), 5187 states have call successors, (5187), 474 states have call predecessors, (5187), 473 states have return successors, (5191), 5079 states have call predecessors, (5191), 5186 states have call successors, (5191) [2021-11-23 03:31:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10580 states to 10580 states and 16748 transitions. [2021-11-23 03:31:09,628 INFO L78 Accepts]: Start accepts. Automaton has 10580 states and 16748 transitions. Word has length 252 [2021-11-23 03:31:09,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:09,630 INFO L470 AbstractCegarLoop]: Abstraction has 10580 states and 16748 transitions. [2021-11-23 03:31:09,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:31:09,631 INFO L276 IsEmpty]: Start isEmpty. Operand 10580 states and 16748 transitions. [2021-11-23 03:31:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-23 03:31:09,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:09,640 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:09,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:31:09,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:09,855 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:09,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:09,855 INFO L85 PathProgramCache]: Analyzing trace with hash -198435588, now seen corresponding path program 1 times [2021-11-23 03:31:09,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:09,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15162786] [2021-11-23 03:31:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:09,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:10,027 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:31:10,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816025957] [2021-11-23 03:31:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:10,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:10,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:31:10,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:31:10,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:31:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:11,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 5434 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:31:11,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:31:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-11-23 03:31:11,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:31:11,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:11,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15162786] [2021-11-23 03:31:11,939 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:31:11,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816025957] [2021-11-23 03:31:11,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816025957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:11,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:11,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:11,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081482805] [2021-11-23 03:31:11,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:11,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:31:11,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:11,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:31:11,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:31:11,941 INFO L87 Difference]: Start difference. First operand 10580 states and 16748 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:31:17,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:19,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:22,060 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:31:23,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:25,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:27,662 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:28,992 INFO L93 Difference]: Finished difference Result 21172 states and 33503 transitions. [2021-11-23 03:31:28,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:31:28,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 253 [2021-11-23 03:31:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:29,068 INFO L225 Difference]: With dead ends: 21172 [2021-11-23 03:31:29,068 INFO L226 Difference]: Without dead ends: 10629 [2021-11-23 03:31:29,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:31:29,130 INFO L933 BasicCegarLoop]: 5946 mSDtfsCounter, 4660 mSDsluCounter, 17058 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4667 SdHoareTripleChecker+Valid, 22257 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:29,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4667 Valid, 22257 Invalid, 1031 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1023 Invalid, 5 Unknown, 0 Unchecked, 16.5s Time] [2021-11-23 03:31:29,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10629 states. [2021-11-23 03:31:30,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10629 to 10598. [2021-11-23 03:31:30,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10598 states, 4935 states have (on average 1.2948328267477203) internal successors, (6390), 5156 states have internal predecessors, (6390), 5187 states have call successors, (5187), 476 states have call predecessors, (5187), 475 states have return successors, (5191), 5079 states have call predecessors, (5191), 5186 states have call successors, (5191) [2021-11-23 03:31:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10598 states to 10598 states and 16768 transitions. [2021-11-23 03:31:30,279 INFO L78 Accepts]: Start accepts. Automaton has 10598 states and 16768 transitions. Word has length 253 [2021-11-23 03:31:30,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:30,281 INFO L470 AbstractCegarLoop]: Abstraction has 10598 states and 16768 transitions. [2021-11-23 03:31:30,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:31:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand 10598 states and 16768 transitions. [2021-11-23 03:31:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 03:31:30,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:30,291 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:30,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:31:30,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:30,505 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:30,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:30,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2073230283, now seen corresponding path program 1 times [2021-11-23 03:31:30,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:30,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129330243] [2021-11-23 03:31:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:30,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:30,733 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:31:30,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115964234] [2021-11-23 03:31:30,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:30,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:30,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:31:30,735 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:31:30,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:31:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:32,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 5428 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:31:32,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:31:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-11-23 03:31:32,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:31:32,599 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:32,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129330243] [2021-11-23 03:31:32,599 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:31:32,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115964234] [2021-11-23 03:31:32,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115964234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:32,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:32,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:32,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156317965] [2021-11-23 03:31:32,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:32,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:31:32,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:32,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:31:32,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:31:32,602 INFO L87 Difference]: Start difference. First operand 10598 states and 16768 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:31:35,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:37,811 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:38,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:41,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:43,832 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:31:45,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:45,034 INFO L93 Difference]: Finished difference Result 26465 states and 41848 transitions. [2021-11-23 03:31:45,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:31:45,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 250 [2021-11-23 03:31:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:45,137 INFO L225 Difference]: With dead ends: 26465 [2021-11-23 03:31:45,137 INFO L226 Difference]: Without dead ends: 15904 [2021-11-23 03:31:45,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:31:45,214 INFO L933 BasicCegarLoop]: 6277 mSDtfsCounter, 4634 mSDsluCounter, 17760 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4641 SdHoareTripleChecker+Valid, 23264 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:45,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4641 Valid, 23264 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1068 Invalid, 3 Unknown, 0 Unchecked, 11.7s Time] [2021-11-23 03:31:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15904 states. [2021-11-23 03:31:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15904 to 15781. [2021-11-23 03:31:46,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15781 states, 7331 states have (on average 1.2954576456145137) internal successors, (9497), 7658 states have internal predecessors, (9497), 7742 states have call successors, (7742), 708 states have call predecessors, (7742), 707 states have return successors, (7750), 7578 states have call predecessors, (7750), 7741 states have call successors, (7750) [2021-11-23 03:31:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15781 states to 15781 states and 24989 transitions. [2021-11-23 03:31:46,951 INFO L78 Accepts]: Start accepts. Automaton has 15781 states and 24989 transitions. Word has length 250 [2021-11-23 03:31:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:46,952 INFO L470 AbstractCegarLoop]: Abstraction has 15781 states and 24989 transitions. [2021-11-23 03:31:46,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:31:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 15781 states and 24989 transitions. [2021-11-23 03:31:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-23 03:31:46,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:46,966 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:47,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:31:47,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:47,181 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:47,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:47,182 INFO L85 PathProgramCache]: Analyzing trace with hash 636708961, now seen corresponding path program 1 times [2021-11-23 03:31:47,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:47,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916594758] [2021-11-23 03:31:47,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:47,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:47,363 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:31:47,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649484751] [2021-11-23 03:31:47,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:47,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:47,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:31:47,365 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:31:47,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:31:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:48,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 5424 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:31:48,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:31:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-11-23 03:31:49,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:31:49,345 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:49,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916594758] [2021-11-23 03:31:49,345 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:31:49,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649484751] [2021-11-23 03:31:49,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649484751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:49,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:49,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:49,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748344455] [2021-11-23 03:31:49,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:49,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:31:49,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:49,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:31:49,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:31:49,348 INFO L87 Difference]: Start difference. First operand 15781 states and 24989 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:31:54,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:56,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:59,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:32:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:00,122 INFO L93 Difference]: Finished difference Result 31609 states and 50036 transitions. [2021-11-23 03:32:00,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:32:00,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 259 [2021-11-23 03:32:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:00,231 INFO L225 Difference]: With dead ends: 31609 [2021-11-23 03:32:00,231 INFO L226 Difference]: Without dead ends: 15865 [2021-11-23 03:32:00,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:32:00,335 INFO L933 BasicCegarLoop]: 4495 mSDtfsCounter, 4660 mSDsluCounter, 9491 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4667 SdHoareTripleChecker+Valid, 13481 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:00,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4667 Valid, 13481 Invalid, 777 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 773 Invalid, 3 Unknown, 0 Unchecked, 9.9s Time] [2021-11-23 03:32:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15865 states. [2021-11-23 03:32:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15865 to 15847. [2021-11-23 03:32:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15847 states, 7385 states have (on average 1.2949221394719026) internal successors, (9563), 7713 states have internal predecessors, (9563), 7743 states have call successors, (7743), 718 states have call predecessors, (7743), 718 states have return successors, (7754), 7579 states have call predecessors, (7754), 7742 states have call successors, (7754) [2021-11-23 03:32:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15847 states to 15847 states and 25060 transitions. [2021-11-23 03:32:02,324 INFO L78 Accepts]: Start accepts. Automaton has 15847 states and 25060 transitions. Word has length 259 [2021-11-23 03:32:02,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:02,326 INFO L470 AbstractCegarLoop]: Abstraction has 15847 states and 25060 transitions. [2021-11-23 03:32:02,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:32:02,327 INFO L276 IsEmpty]: Start isEmpty. Operand 15847 states and 25060 transitions. [2021-11-23 03:32:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-23 03:32:02,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:02,341 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:02,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:02,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:32:02,557 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:02,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1729171502, now seen corresponding path program 1 times [2021-11-23 03:32:02,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:02,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640720932] [2021-11-23 03:32:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:02,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:02,939 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:32:02,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040307467] [2021-11-23 03:32:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:02,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:02,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:02,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:02,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:32:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:04,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 5422 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:32:04,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-11-23 03:32:04,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:32:04,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:04,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640720932] [2021-11-23 03:32:04,916 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:32:04,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040307467] [2021-11-23 03:32:04,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040307467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:04,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:04,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:32:04,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373800413] [2021-11-23 03:32:04,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:04,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:32:04,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:32:04,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:32:04,919 INFO L87 Difference]: Start difference. First operand 15847 states and 25060 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:32:08,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:11,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:32:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:12,308 INFO L93 Difference]: Finished difference Result 31771 states and 50197 transitions. [2021-11-23 03:32:12,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:32:12,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 258 [2021-11-23 03:32:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:12,396 INFO L225 Difference]: With dead ends: 31771 [2021-11-23 03:32:12,397 INFO L226 Difference]: Without dead ends: 15961 [2021-11-23 03:32:12,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:32:12,483 INFO L933 BasicCegarLoop]: 4495 mSDtfsCounter, 4648 mSDsluCounter, 9504 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4657 SdHoareTripleChecker+Valid, 13494 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:12,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4657 Valid, 13494 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 774 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2021-11-23 03:32:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15961 states. [2021-11-23 03:32:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15961 to 15919. [2021-11-23 03:32:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15919 states, 7442 states have (on average 1.294275732330019) internal successors, (9632), 7770 states have internal predecessors, (9632), 7743 states have call successors, (7743), 733 states have call predecessors, (7743), 733 states have return successors, (7754), 7579 states have call predecessors, (7754), 7742 states have call successors, (7754) [2021-11-23 03:32:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15919 states to 15919 states and 25129 transitions. [2021-11-23 03:32:14,135 INFO L78 Accepts]: Start accepts. Automaton has 15919 states and 25129 transitions. Word has length 258 [2021-11-23 03:32:14,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:14,136 INFO L470 AbstractCegarLoop]: Abstraction has 15919 states and 25129 transitions. [2021-11-23 03:32:14,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:32:14,136 INFO L276 IsEmpty]: Start isEmpty. Operand 15919 states and 25129 transitions. [2021-11-23 03:32:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-23 03:32:14,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:14,147 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:14,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:14,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:14,369 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:14,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:14,370 INFO L85 PathProgramCache]: Analyzing trace with hash 439359343, now seen corresponding path program 1 times [2021-11-23 03:32:14,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:14,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888814782] [2021-11-23 03:32:14,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:14,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:14,538 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:32:14,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348921408] [2021-11-23 03:32:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:14,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:14,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:14,540 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:14,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:32:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:15,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 5418 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:32:15,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-11-23 03:32:16,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:32:16,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:16,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888814782] [2021-11-23 03:32:16,481 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:32:16,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348921408] [2021-11-23 03:32:16,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348921408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:16,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:16,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:32:16,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105792631] [2021-11-23 03:32:16,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:16,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:32:16,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:16,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:32:16,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:32:16,482 INFO L87 Difference]: Start difference. First operand 15919 states and 25129 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:32:20,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:23,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:32:25,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:25,583 INFO L93 Difference]: Finished difference Result 47782 states and 75402 transitions. [2021-11-23 03:32:25,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:32:25,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 256 [2021-11-23 03:32:25,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:25,742 INFO L225 Difference]: With dead ends: 47782 [2021-11-23 03:32:25,742 INFO L226 Difference]: Without dead ends: 31900 [2021-11-23 03:32:25,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:32:25,833 INFO L933 BasicCegarLoop]: 6437 mSDtfsCounter, 4661 mSDsluCounter, 18066 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4670 SdHoareTripleChecker+Valid, 23741 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:25,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4670 Valid, 23741 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1046 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2021-11-23 03:32:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31900 states. [2021-11-23 03:32:28,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31900 to 31641. [2021-11-23 03:32:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31641 states, 14756 states have (on average 1.2959474112225535) internal successors, (19123), 15424 states have internal predecessors, (19123), 15438 states have call successors, (15438), 1446 states have call predecessors, (15438), 1446 states have return successors, (15467), 15098 states have call predecessors, (15467), 15437 states have call successors, (15467) [2021-11-23 03:32:28,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31641 states to 31641 states and 50028 transitions. [2021-11-23 03:32:28,952 INFO L78 Accepts]: Start accepts. Automaton has 31641 states and 50028 transitions. Word has length 256 [2021-11-23 03:32:28,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:28,952 INFO L470 AbstractCegarLoop]: Abstraction has 31641 states and 50028 transitions. [2021-11-23 03:32:28,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:32:28,952 INFO L276 IsEmpty]: Start isEmpty. Operand 31641 states and 50028 transitions. [2021-11-23 03:32:28,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-23 03:32:28,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:28,965 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:29,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:29,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:29,193 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:29,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:29,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1345552222, now seen corresponding path program 1 times [2021-11-23 03:32:29,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:29,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116444868] [2021-11-23 03:32:29,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:29,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:29,342 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:32:29,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655110501] [2021-11-23 03:32:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:29,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:29,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:29,344 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:29,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:32:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:30,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 5420 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:32:30,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-11-23 03:32:31,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:32:31,263 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:31,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116444868] [2021-11-23 03:32:31,263 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:32:31,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655110501] [2021-11-23 03:32:31,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655110501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:31,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:31,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:32:31,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306770760] [2021-11-23 03:32:31,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:31,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:32:31,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:31,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:32:31,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:32:31,266 INFO L87 Difference]: Start difference. First operand 31641 states and 50028 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:32:33,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:39,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:32:40,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:40,807 INFO L93 Difference]: Finished difference Result 48371 states and 76039 transitions. [2021-11-23 03:32:40,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:32:40,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 257 [2021-11-23 03:32:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:40,971 INFO L225 Difference]: With dead ends: 48371 [2021-11-23 03:32:40,971 INFO L226 Difference]: Without dead ends: 31421 [2021-11-23 03:32:41,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:32:41,062 INFO L933 BasicCegarLoop]: 4495 mSDtfsCounter, 4662 mSDsluCounter, 9489 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4669 SdHoareTripleChecker+Valid, 13481 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:41,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4669 Valid, 13481 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 772 Invalid, 2 Unknown, 0 Unchecked, 8.0s Time] [2021-11-23 03:32:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31421 states. [2021-11-23 03:32:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31421 to 31289. [2021-11-23 03:32:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31289 states, 14552 states have (on average 1.2946673996701483) internal successors, (18840), 15178 states have internal predecessors, (18840), 15307 states have call successors, (15307), 1429 states have call predecessors, (15307), 1429 states have return successors, (15336), 14973 states have call predecessors, (15336), 15306 states have call successors, (15336) [2021-11-23 03:32:44,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31289 states to 31289 states and 49483 transitions. [2021-11-23 03:32:44,051 INFO L78 Accepts]: Start accepts. Automaton has 31289 states and 49483 transitions. Word has length 257 [2021-11-23 03:32:44,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:44,051 INFO L470 AbstractCegarLoop]: Abstraction has 31289 states and 49483 transitions. [2021-11-23 03:32:44,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:32:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 31289 states and 49483 transitions. [2021-11-23 03:32:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-23 03:32:44,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:44,069 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:44,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 03:32:44,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:44,285 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:44,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:44,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1733904829, now seen corresponding path program 1 times [2021-11-23 03:32:44,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:44,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374819468] [2021-11-23 03:32:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:44,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2021-11-23 03:32:44,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:44,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374819468] [2021-11-23 03:32:44,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374819468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:44,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:44,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:32:44,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620809069] [2021-11-23 03:32:44,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:44,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:32:44,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:44,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:32:44,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:32:44,796 INFO L87 Difference]: Start difference. First operand 31289 states and 49483 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:32:47,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:49,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:53,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:32:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:55,607 INFO L93 Difference]: Finished difference Result 90818 states and 143897 transitions. [2021-11-23 03:32:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:32:55,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 265 [2021-11-23 03:32:55,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:55,903 INFO L225 Difference]: With dead ends: 90818 [2021-11-23 03:32:55,903 INFO L226 Difference]: Without dead ends: 59566 [2021-11-23 03:32:56,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:32:56,034 INFO L933 BasicCegarLoop]: 6999 mSDtfsCounter, 4353 mSDsluCounter, 4637 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4356 SdHoareTripleChecker+Valid, 11400 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:56,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4356 Valid, 11400 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 615 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2021-11-23 03:32:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59566 states. [2021-11-23 03:33:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59566 to 59550. [2021-11-23 03:33:00,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59550 states, 27200 states have (on average 1.2893014705882353) internal successors, (35069), 28428 states have internal predecessors, (35069), 29657 states have call successors, (29657), 2692 states have call predecessors, (29657), 2692 states have return successors, (29716), 29001 states have call predecessors, (29716), 29656 states have call successors, (29716) [2021-11-23 03:33:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59550 states to 59550 states and 94442 transitions. [2021-11-23 03:33:01,351 INFO L78 Accepts]: Start accepts. Automaton has 59550 states and 94442 transitions. Word has length 265 [2021-11-23 03:33:01,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:01,354 INFO L470 AbstractCegarLoop]: Abstraction has 59550 states and 94442 transitions. [2021-11-23 03:33:01,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:33:01,354 INFO L276 IsEmpty]: Start isEmpty. Operand 59550 states and 94442 transitions. [2021-11-23 03:33:01,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-23 03:33:01,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:01,400 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:01,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:33:01,401 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:01,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1181721346, now seen corresponding path program 1 times [2021-11-23 03:33:01,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:01,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834533864] [2021-11-23 03:33:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:01,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:01,554 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:33:01,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599546035] [2021-11-23 03:33:01,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:01,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:01,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:33:01,556 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:33:01,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:33:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:02,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 5501 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:33:02,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-11-23 03:33:03,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:33:03,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:03,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834533864] [2021-11-23 03:33:03,151 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:33:03,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599546035] [2021-11-23 03:33:03,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599546035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:03,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:03,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:33:03,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214410062] [2021-11-23 03:33:03,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:03,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:33:03,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:03,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:33:03,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:33:03,153 INFO L87 Difference]: Start difference. First operand 59550 states and 94442 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-23 03:33:04,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:06,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:07,616 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:08,898 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:10,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:14,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:16,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:18,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:20,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:22,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:26,239 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:33:31,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:31,269 INFO L93 Difference]: Finished difference Result 139603 states and 221202 transitions. [2021-11-23 03:33:31,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:33:31,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) Word has length 267 [2021-11-23 03:33:31,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:31,941 INFO L225 Difference]: With dead ends: 139603 [2021-11-23 03:33:31,941 INFO L226 Difference]: Without dead ends: 99474 [2021-11-23 03:33:32,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:33:32,131 INFO L933 BasicCegarLoop]: 6071 mSDtfsCounter, 4739 mSDsluCounter, 30061 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4746 SdHoareTripleChecker+Valid, 34783 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:32,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4746 Valid, 34783 Invalid, 1686 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1679 Invalid, 5 Unknown, 0 Unchecked, 23.6s Time] [2021-11-23 03:33:32,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99474 states. [2021-11-23 03:33:39,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99474 to 98882. [2021-11-23 03:33:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98882 states, 45082 states have (on average 1.28949469854931) internal successors, (58133), 47142 states have internal predecessors, (58133), 49333 states have call successors, (49333), 4450 states have call predecessors, (49333), 4466 states have return successors, (49472), 48229 states have call predecessors, (49472), 49332 states have call successors, (49472) [2021-11-23 03:33:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98882 states to 98882 states and 156938 transitions. [2021-11-23 03:33:41,281 INFO L78 Accepts]: Start accepts. Automaton has 98882 states and 156938 transitions. Word has length 267 [2021-11-23 03:33:41,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:41,282 INFO L470 AbstractCegarLoop]: Abstraction has 98882 states and 156938 transitions. [2021-11-23 03:33:41,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-23 03:33:41,283 INFO L276 IsEmpty]: Start isEmpty. Operand 98882 states and 156938 transitions. [2021-11-23 03:33:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-23 03:33:41,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:41,303 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:41,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:41,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 03:33:41,503 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:41,504 INFO L85 PathProgramCache]: Analyzing trace with hash -618742795, now seen corresponding path program 1 times [2021-11-23 03:33:41,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:41,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151846256] [2021-11-23 03:33:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:41,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:41,662 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:33:41,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144415368] [2021-11-23 03:33:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:41,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:41,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:33:41,664 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:33:41,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873c495b-9d9d-4d67-901e-40ee8b0ba1eb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:33:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:42,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 5503 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:33:42,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-11-23 03:33:43,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:33:43,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:43,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151846256] [2021-11-23 03:33:43,328 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:33:43,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144415368] [2021-11-23 03:33:43,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144415368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:43,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:43,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:33:43,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907968623] [2021-11-23 03:33:43,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:43,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:33:43,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:43,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:33:43,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:33:43,329 INFO L87 Difference]: Start difference. First operand 98882 states and 156938 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-23 03:33:46,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:51,762 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:55,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []