./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d62cca735e5e5c3ed49d61d09e2b8d7696fac03708570c9e23afbb5bfdcaa275 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:48:55,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:48:55,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:48:55,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:48:55,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:48:55,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:48:55,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:48:55,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:48:55,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:48:55,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:48:55,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:48:55,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:48:55,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:48:55,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:48:55,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:48:55,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:48:55,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:48:55,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:48:55,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:48:55,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:48:55,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:48:55,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:48:55,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:48:55,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:48:55,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:48:55,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:48:55,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:48:55,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:48:55,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:48:55,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:48:55,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:48:55,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:48:55,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:48:55,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:48:55,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:48:55,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:48:55,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:48:55,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:48:55,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:48:55,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:48:55,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:48:55,934 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:48:55,973 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:48:55,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:48:55,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:48:55,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:48:55,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:48:55,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:48:55,977 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:48:55,977 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:48:55,978 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:48:55,978 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:48:55,979 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:48:55,979 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:48:55,979 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:48:55,979 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:48:55,980 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:48:55,980 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:48:55,980 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:48:55,980 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:48:55,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:48:55,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:48:55,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:48:55,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:48:55,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:48:55,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:48:55,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:48:55,983 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:48:55,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:48:55,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:48:55,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:48:55,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:48:55,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:48:55,984 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:48:55,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:48:55,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:48:55,985 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:48:55,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:48:55,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:48:55,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:48:55,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d62cca735e5e5c3ed49d61d09e2b8d7696fac03708570c9e23afbb5bfdcaa275 [2022-11-03 02:48:56,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:48:56,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:48:56,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:48:56,361 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:48:56,368 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:48:56,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2022-11-03 02:48:56,445 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/data/3e72dd873/018417d90ab646d6b5d31357ca572b73/FLAG9db90d058 [2022-11-03 02:48:57,297 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:48:57,298 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2022-11-03 02:48:57,376 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/data/3e72dd873/018417d90ab646d6b5d31357ca572b73/FLAG9db90d058 [2022-11-03 02:48:57,766 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/data/3e72dd873/018417d90ab646d6b5d31357ca572b73 [2022-11-03 02:48:57,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:48:57,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:48:57,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:48:57,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:48:57,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:48:57,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:48:57" (1/1) ... [2022-11-03 02:48:57,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb90168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:57, skipping insertion in model container [2022-11-03 02:48:57,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:48:57" (1/1) ... [2022-11-03 02:48:57,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:48:57,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:49:00,578 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_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[361017,361030] [2022-11-03 02:49:00,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:49:00,763 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:49:01,299 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_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[361017,361030] [2022-11-03 02:49:01,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:49:01,693 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:49:01,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01 WrapperNode [2022-11-03 02:49:01,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:49:01,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:49:01,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:49:01,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:49:01,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:01,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:02,557 INFO L138 Inliner]: procedures = 359, calls = 7215, calls flagged for inlining = 183, calls inlined = 137, statements flattened = 11745 [2022-11-03 02:49:02,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:49:02,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:49:02,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:49:02,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:49:02,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:02,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:02,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:02,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:03,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:03,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:03,429 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:03,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:03,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:49:03,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:49:03,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:49:03,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:49:03,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:03,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:49:03,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:03,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:49:03,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:49:03,601 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-11-03 02:49:03,602 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-11-03 02:49:03,602 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-03 02:49:03,602 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-03 02:49:03,602 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2022-11-03 02:49:03,602 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2022-11-03 02:49:03,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:49:03,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:49:03,603 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-03 02:49:03,603 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-03 02:49:03,603 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_recv_bulk_msg [2022-11-03 02:49:03,603 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_recv_bulk_msg [2022-11-03 02:49:03,604 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:49:03,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:49:03,604 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_save_screen [2022-11-03 02:49:03,604 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_save_screen [2022-11-03 02:49:03,605 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_free_buffers [2022-11-03 02:49:03,605 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_free_buffers [2022-11-03 02:49:03,605 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_disconnect [2022-11-03 02:49:03,605 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_disconnect [2022-11-03 02:49:03,605 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_deinit [2022-11-03 02:49:03,605 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_deinit [2022-11-03 02:49:03,606 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_memio_byte [2022-11-03 02:49:03,606 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_memio_byte [2022-11-03 02:49:03,606 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 02:49:03,606 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 02:49:03,606 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-11-03 02:49:03,606 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-11-03 02:49:03,607 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:49:03,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:49:03,607 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_set_cursor [2022-11-03 02:49:03,607 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_set_cursor [2022-11-03 02:49:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister_dev [2022-11-03 02:49:03,608 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister_dev [2022-11-03 02:49:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-11-03 02:49:03,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-11-03 02:49:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_memio_word [2022-11-03 02:49:03,609 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_memio_word [2022-11-03 02:49:03,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:49:03,609 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:49:03,609 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetReg [2022-11-03 02:49:03,609 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetReg [2022-11-03 02:49:03,609 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 02:49:03,610 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 02:49:03,610 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_get_sisusb_lock_and_check [2022-11-03 02:49:03,610 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_get_sisusb_lock_and_check [2022-11-03 02:49:03,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:49:03,611 INFO L130 BoogieDeclarations]: Found specification of procedure take_over_console [2022-11-03 02:49:03,611 INFO L138 BoogieDeclarations]: Found implementation of procedure take_over_console [2022-11-03 02:49:03,612 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_sisusb_valid [2022-11-03 02:49:03,612 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_sisusb_valid [2022-11-03 02:49:03,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:49:03,613 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetRegOR [2022-11-03 02:49:03,613 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetRegOR [2022-11-03 02:49:03,614 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_sisusb_usb_data [2022-11-03 02:49:03,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_sisusb_usb_data [2022-11-03 02:49:03,614 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2022-11-03 02:49:03,614 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_check_rbc [2022-11-03 02:49:03,614 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_check_rbc [2022-11-03 02:49:03,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:49:03,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:49:03,615 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-03 02:49:03,615 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-03 02:49:03,615 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_outurb_available [2022-11-03 02:49:03,615 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_outurb_available [2022-11-03 02:49:03,615 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_kill_all_busy [2022-11-03 02:49:03,615 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_kill_all_busy [2022-11-03 02:49:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 02:49:03,616 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 02:49:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-03 02:49:03,616 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-03 02:49:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_getidxreg [2022-11-03 02:49:03,616 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_getidxreg [2022-11-03 02:49:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-11-03 02:49:03,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-11-03 02:49:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-03 02:49:03,618 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-03 02:49:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_writeb [2022-11-03 02:49:03,618 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_writeb [2022-11-03 02:49:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 02:49:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-03 02:49:03,619 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-03 02:49:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_set_default_mode [2022-11-03 02:49:03,620 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_set_default_mode [2022-11-03 02:49:03,620 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_memio_byte [2022-11-03 02:49:03,620 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_memio_byte [2022-11-03 02:49:03,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 02:49:03,620 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_DisplayOn [2022-11-03 02:49:03,621 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_DisplayOn [2022-11-03 02:49:03,621 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setidxregandor [2022-11-03 02:49:03,622 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setidxregandor [2022-11-03 02:49:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_mem_bulk [2022-11-03 02:49:03,623 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_mem_bulk [2022-11-03 02:49:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2022-11-03 02:49:03,623 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2022-11-03 02:49:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbdummycon_init [2022-11-03 02:49:03,623 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbdummycon_init [2022-11-03 02:49:03,624 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2022-11-03 02:49:03,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2022-11-03 02:49:03,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:49:03,624 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_GetReg [2022-11-03 02:49:03,624 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_GetReg [2022-11-03 02:49:03,624 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_do_font_op [2022-11-03 02:49:03,625 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_do_font_op [2022-11-03 02:49:03,625 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_init_gfxdevice [2022-11-03 02:49:03,625 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_init_gfxdevice [2022-11-03 02:49:03,625 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetRegByte [2022-11-03 02:49:03,626 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetRegByte [2022-11-03 02:49:03,626 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_free_urbs [2022-11-03 02:49:03,626 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_free_urbs [2022-11-03 02:49:03,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 02:49:03,630 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 02:49:03,630 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_send_bridge_packet [2022-11-03 02:49:03,630 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_send_bridge_packet [2022-11-03 02:49:03,630 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 02:49:03,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 02:49:03,633 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-03 02:49:03,633 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-03 02:49:03,633 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_ioctl [2022-11-03 02:49:03,633 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_ioctl [2022-11-03 02:49:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_memio_word [2022-11-03 02:49:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_memio_word [2022-11-03 02:49:03,640 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_get_sisusb [2022-11-03 02:49:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_get_sisusb [2022-11-03 02:49:03,640 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:49:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:49:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_cursor [2022-11-03 02:49:03,641 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_cursor [2022-11-03 02:49:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_is_inactive [2022-11-03 02:49:03,641 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_is_inactive [2022-11-03 02:49:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2022-11-03 02:49:03,641 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2022-11-03 02:49:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_clear_vram [2022-11-03 02:49:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_clear_vram [2022-11-03 02:49:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_pci_config [2022-11-03 02:49:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_pci_config [2022-11-03 02:49:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:49:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-03 02:49:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-03 02:49:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_send_bulk_msg [2022-11-03 02:49:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_send_bulk_msg [2022-11-03 02:49:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2022-11-03 02:49:03,643 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2022-11-03 02:49:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:49:03,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:49:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_readb [2022-11-03 02:49:03,643 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_readb [2022-11-03 02:49:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setidxregor [2022-11-03 02:49:03,644 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setidxregor [2022-11-03 02:49:03,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:49:03,644 INFO L130 BoogieDeclarations]: Found specification of procedure vmalloc [2022-11-03 02:49:03,644 INFO L138 BoogieDeclarations]: Found implementation of procedure vmalloc [2022-11-03 02:49:03,644 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-03 02:49:03,644 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-03 02:49:03,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:49:03,645 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_send_packet [2022-11-03 02:49:03,645 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_send_packet [2022-11-03 02:49:03,645 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_memio_long [2022-11-03 02:49:03,645 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_memio_long [2022-11-03 02:49:03,645 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_reset_text_mode [2022-11-03 02:49:03,645 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_reset_text_mode [2022-11-03 02:49:03,645 INFO L130 BoogieDeclarations]: Found specification of procedure SiSUSB_InitPtr [2022-11-03 02:49:03,646 INFO L138 BoogieDeclarations]: Found implementation of procedure SiSUSB_InitPtr [2022-11-03 02:49:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:49:03,646 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_pci_config [2022-11-03 02:49:03,646 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_pci_config [2022-11-03 02:49:03,647 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-03 02:49:03,647 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setidxreg [2022-11-03 02:49:03,647 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setidxreg [2022-11-03 02:49:03,647 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetRegANDOR [2022-11-03 02:49:03,647 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetRegANDOR [2022-11-03 02:49:03,647 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 02:49:03,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 02:49:03,647 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_wait_all_out_complete [2022-11-03 02:49:03,648 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_wait_all_out_complete [2022-11-03 02:49:03,648 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-03 02:49:03,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-03 02:49:03,648 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetRegAND [2022-11-03 02:49:03,648 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetRegAND [2022-11-03 02:49:03,648 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setidxregand [2022-11-03 02:49:03,648 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setidxregand [2022-11-03 02:49:03,649 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-03 02:49:03,649 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-03 02:49:03,649 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetSegmentReg [2022-11-03 02:49:03,649 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetSegmentReg [2022-11-03 02:49:03,649 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_copy_memory [2022-11-03 02:49:03,649 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_copy_memory [2022-11-03 02:49:03,649 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setreg [2022-11-03 02:49:03,650 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setreg [2022-11-03 02:49:03,650 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_sisusb_usb_data [2022-11-03 02:49:03,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_sisusb_usb_data [2022-11-03 02:49:03,650 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_set_start_address [2022-11-03 02:49:03,650 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_set_start_address [2022-11-03 02:49:03,650 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2022-11-03 02:49:03,650 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2022-11-03 02:49:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-03 02:49:03,651 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-03 02:49:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_WriteDAC [2022-11-03 02:49:03,651 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_WriteDAC [2022-11-03 02:49:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_mem_bulk [2022-11-03 02:49:03,651 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_mem_bulk [2022-11-03 02:49:03,651 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_getreg [2022-11-03 02:49:03,651 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_getreg [2022-11-03 02:49:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure SiSUSBSetMode [2022-11-03 02:49:03,652 INFO L138 BoogieDeclarations]: Found implementation of procedure SiSUSBSetMode [2022-11-03 02:49:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure vc_resize [2022-11-03 02:49:03,652 INFO L138 BoogieDeclarations]: Found implementation of procedure vc_resize [2022-11-03 02:49:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_init [2022-11-03 02:49:03,652 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_init [2022-11-03 02:49:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout [2022-11-03 02:49:03,653 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout [2022-11-03 02:49:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:49:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_memio_long [2022-11-03 02:49:03,653 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_memio_long [2022-11-03 02:49:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_GetRegByte [2022-11-03 02:49:03,653 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_GetRegByte [2022-11-03 02:49:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-03 02:49:03,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-03 02:49:03,654 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_triggersr16 [2022-11-03 02:49:03,654 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_triggersr16 [2022-11-03 02:49:03,654 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-11-03 02:49:03,654 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-11-03 02:49:03,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:49:03,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:49:03,655 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_all_free [2022-11-03 02:49:03,655 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_all_free [2022-11-03 02:49:04,724 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:49:04,728 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:49:39,076 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:49:41,411 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:49:41,411 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:49:41,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:49:41 BoogieIcfgContainer [2022-11-03 02:49:41,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:49:41,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:49:41,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:49:41,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:49:41,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:48:57" (1/3) ... [2022-11-03 02:49:41,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13366e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:49:41, skipping insertion in model container [2022-11-03 02:49:41,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (2/3) ... [2022-11-03 02:49:41,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13366e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:49:41, skipping insertion in model container [2022-11-03 02:49:41,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:49:41" (3/3) ... [2022-11-03 02:49:41,433 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2022-11-03 02:49:41,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:49:41,453 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:49:41,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:49:41,571 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@71a72712, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:49:41,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:49:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand has 2233 states, 1362 states have (on average 1.3193832599118942) internal successors, (1797), 1389 states have internal predecessors, (1797), 765 states have call successors, (765), 104 states have call predecessors, (765), 104 states have return successors, (765), 761 states have call predecessors, (765), 765 states have call successors, (765) [2022-11-03 02:49:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 02:49:41,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:41,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:41,592 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:41,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:41,597 INFO L85 PathProgramCache]: Analyzing trace with hash 258264672, now seen corresponding path program 1 times [2022-11-03 02:49:41,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:41,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336668710] [2022-11-03 02:49:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:41,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:43,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:43,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336668710] [2022-11-03 02:49:43,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336668710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:43,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:43,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:49:43,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445214783] [2022-11-03 02:49:43,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:43,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:43,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:43,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:43,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:49:43,326 INFO L87 Difference]: Start difference. First operand has 2233 states, 1362 states have (on average 1.3193832599118942) internal successors, (1797), 1389 states have internal predecessors, (1797), 765 states have call successors, (765), 104 states have call predecessors, (765), 104 states have return successors, (765), 761 states have call predecessors, (765), 765 states have call successors, (765) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:49:48,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:49:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:50,274 INFO L93 Difference]: Finished difference Result 4459 states and 6713 transitions. [2022-11-03 02:49:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:49:50,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-03 02:49:50,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:50,313 INFO L225 Difference]: With dead ends: 4459 [2022-11-03 02:49:50,313 INFO L226 Difference]: Without dead ends: 2229 [2022-11-03 02:49:50,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:49:50,337 INFO L413 NwaCegarLoop]: 3034 mSDtfsCounter, 0 mSDsluCounter, 3317 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6067 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:50,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6067 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 572 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 02:49:50,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2022-11-03 02:49:50,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 2229. [2022-11-03 02:49:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 1361 states have (on average 1.3181484202792064) internal successors, (1794), 1386 states have internal predecessors, (1794), 765 states have call successors, (765), 104 states have call predecessors, (765), 102 states have return successors, (759), 755 states have call predecessors, (759), 759 states have call successors, (759) [2022-11-03 02:49:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 3318 transitions. [2022-11-03 02:49:50,542 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 3318 transitions. Word has length 14 [2022-11-03 02:49:50,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:50,544 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 3318 transitions. [2022-11-03 02:49:50,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:49:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 3318 transitions. [2022-11-03 02:49:50,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:49:50,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:50,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:50,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:49:50,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:50,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:50,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1990268969, now seen corresponding path program 1 times [2022-11-03 02:49:50,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:50,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703919971] [2022-11-03 02:49:50,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:50,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:51,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:51,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703919971] [2022-11-03 02:49:51,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703919971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:51,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374474155] [2022-11-03 02:49:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:51,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:51,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:51,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:51,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:49:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:54,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 8399 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:49:54,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:49:54,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:54,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374474155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:54,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:54,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-03 02:49:54,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343066271] [2022-11-03 02:49:54,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:54,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:54,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:54,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:49:54,219 INFO L87 Difference]: Start difference. First operand 2229 states and 3318 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:49:59,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:50:01,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:02,398 INFO L93 Difference]: Finished difference Result 2593 states and 3814 transitions. [2022-11-03 02:50:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:50:02,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-03 02:50:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:02,424 INFO L225 Difference]: With dead ends: 2593 [2022-11-03 02:50:02,424 INFO L226 Difference]: Without dead ends: 2590 [2022-11-03 02:50:02,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:50:02,429 INFO L413 NwaCegarLoop]: 3130 mSDtfsCounter, 3281 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3284 SdHoareTripleChecker+Valid, 3574 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:02,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3284 Valid, 3574 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 355 Invalid, 2 Unknown, 0 Unchecked, 8.0s Time] [2022-11-03 02:50:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2022-11-03 02:50:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2587. [2022-11-03 02:50:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 1581 states have (on average 1.3149905123339658) internal successors, (2079), 1610 states have internal predecessors, (2079), 866 states have call successors, (866), 141 states have call predecessors, (866), 139 states have return successors, (861), 856 states have call predecessors, (861), 861 states have call successors, (861) [2022-11-03 02:50:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 3806 transitions. [2022-11-03 02:50:02,662 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 3806 transitions. Word has length 15 [2022-11-03 02:50:02,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:02,663 INFO L495 AbstractCegarLoop]: Abstraction has 2587 states and 3806 transitions. [2022-11-03 02:50:02,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:50:02,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 3806 transitions. [2022-11-03 02:50:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:50:02,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:02,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:02,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:02,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:02,881 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:02,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:02,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1566427158, now seen corresponding path program 1 times [2022-11-03 02:50:02,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:02,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712579686] [2022-11-03 02:50:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:02,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:03,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:03,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712579686] [2022-11-03 02:50:03,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712579686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:03,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039930984] [2022-11-03 02:50:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:03,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:03,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:03,965 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:03,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:50:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:06,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 8401 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:50:06,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:50:06,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:06,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039930984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:06,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:50:06,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-03 02:50:06,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980662848] [2022-11-03 02:50:06,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:06,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:50:06,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:06,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:50:06,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:50:06,201 INFO L87 Difference]: Start difference. First operand 2587 states and 3806 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:50:12,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:15,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:50:17,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:18,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:18,719 INFO L93 Difference]: Finished difference Result 6610 states and 9760 transitions. [2022-11-03 02:50:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:50:18,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-11-03 02:50:18,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:18,751 INFO L225 Difference]: With dead ends: 6610 [2022-11-03 02:50:18,751 INFO L226 Difference]: Without dead ends: 4032 [2022-11-03 02:50:18,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:50:18,775 INFO L413 NwaCegarLoop]: 4678 mSDtfsCounter, 2324 mSDsluCounter, 3089 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2325 SdHoareTripleChecker+Valid, 7498 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:18,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2325 Valid, 7498 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 669 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2022-11-03 02:50:18,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4032 states. [2022-11-03 02:50:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4032 to 4028. [2022-11-03 02:50:19,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 2463 states have (on average 1.3085667884693464) internal successors, (3223), 2520 states have internal predecessors, (3223), 1347 states have call successors, (1347), 216 states have call predecessors, (1347), 217 states have return successors, (1355), 1321 states have call predecessors, (1355), 1329 states have call successors, (1355) [2022-11-03 02:50:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 5925 transitions. [2022-11-03 02:50:19,058 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 5925 transitions. Word has length 16 [2022-11-03 02:50:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:19,058 INFO L495 AbstractCegarLoop]: Abstraction has 4028 states and 5925 transitions. [2022-11-03 02:50:19,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:50:19,059 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 5925 transitions. [2022-11-03 02:50:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:50:19,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:19,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:19,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:19,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:19,285 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:19,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1312237772, now seen corresponding path program 1 times [2022-11-03 02:50:19,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:19,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736010033] [2022-11-03 02:50:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:19,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:20,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:20,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736010033] [2022-11-03 02:50:20,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736010033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:20,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777867626] [2022-11-03 02:50:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:20,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:20,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:20,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:20,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:50:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:22,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 8403 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:50:22,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:50:22,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:22,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777867626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:22,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:50:22,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-03 02:50:22,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527442286] [2022-11-03 02:50:22,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:22,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:50:22,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:22,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:50:22,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:50:22,369 INFO L87 Difference]: Start difference. First operand 4028 states and 5925 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:50:26,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:27,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:50:28,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:28,475 INFO L93 Difference]: Finished difference Result 4471 states and 6520 transitions. [2022-11-03 02:50:28,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:50:28,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-03 02:50:28,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:28,503 INFO L225 Difference]: With dead ends: 4471 [2022-11-03 02:50:28,503 INFO L226 Difference]: Without dead ends: 4462 [2022-11-03 02:50:28,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:50:28,508 INFO L413 NwaCegarLoop]: 3079 mSDtfsCounter, 3284 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3285 SdHoareTripleChecker+Valid, 3352 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:28,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3285 Valid, 3352 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 327 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2022-11-03 02:50:28,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2022-11-03 02:50:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 4455. [2022-11-03 02:50:28,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4455 states, 2737 states have (on average 1.3120204603580563) internal successors, (3591), 2801 states have internal predecessors, (3591), 1448 states have call successors, (1448), 267 states have call predecessors, (1448), 269 states have return successors, (1458), 1424 states have call predecessors, (1458), 1432 states have call successors, (1458) [2022-11-03 02:50:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4455 states to 4455 states and 6497 transitions. [2022-11-03 02:50:28,795 INFO L78 Accepts]: Start accepts. Automaton has 4455 states and 6497 transitions. Word has length 17 [2022-11-03 02:50:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:28,796 INFO L495 AbstractCegarLoop]: Abstraction has 4455 states and 6497 transitions. [2022-11-03 02:50:28,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:50:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 4455 states and 6497 transitions. [2022-11-03 02:50:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:50:28,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:28,799 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:50:28,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:29,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:29,025 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:29,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:29,025 INFO L85 PathProgramCache]: Analyzing trace with hash -147111788, now seen corresponding path program 1 times [2022-11-03 02:50:29,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:29,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18712309] [2022-11-03 02:50:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:29,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:50:30,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:30,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18712309] [2022-11-03 02:50:30,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18712309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:30,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937127068] [2022-11-03 02:50:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:30,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:30,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:30,110 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:30,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:50:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:32,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 8581 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:50:32,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:50:32,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:32,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937127068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:32,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:50:32,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-03 02:50:32,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932182525] [2022-11-03 02:50:32,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:32,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:50:32,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:32,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:50:32,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:50:32,351 INFO L87 Difference]: Start difference. First operand 4455 states and 6497 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:50:38,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:50:40,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:41,214 INFO L93 Difference]: Finished difference Result 9113 states and 13342 transitions. [2022-11-03 02:50:41,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:50:41,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-11-03 02:50:41,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:41,247 INFO L225 Difference]: With dead ends: 9113 [2022-11-03 02:50:41,247 INFO L226 Difference]: Without dead ends: 4667 [2022-11-03 02:50:41,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:50:41,275 INFO L413 NwaCegarLoop]: 3060 mSDtfsCounter, 137 mSDsluCounter, 3241 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 6024 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:41,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 6024 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 583 Invalid, 2 Unknown, 0 Unchecked, 8.6s Time] [2022-11-03 02:50:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2022-11-03 02:50:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 4643. [2022-11-03 02:50:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 2863 states have (on average 1.318896262661544) internal successors, (3776), 2934 states have internal predecessors, (3776), 1510 states have call successors, (1510), 267 states have call predecessors, (1510), 269 states have return successors, (1526), 1485 states have call predecessors, (1526), 1494 states have call successors, (1526) [2022-11-03 02:50:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 6812 transitions. [2022-11-03 02:50:41,709 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 6812 transitions. Word has length 36 [2022-11-03 02:50:41,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:41,710 INFO L495 AbstractCegarLoop]: Abstraction has 4643 states and 6812 transitions. [2022-11-03 02:50:41,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:50:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 6812 transitions. [2022-11-03 02:50:41,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:50:41,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:41,718 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:50:41,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:41,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:41,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1039239630, now seen corresponding path program 1 times [2022-11-03 02:50:41,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:41,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759506945] [2022-11-03 02:50:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:41,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:50:42,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:42,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759506945] [2022-11-03 02:50:42,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759506945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:42,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405036743] [2022-11-03 02:50:42,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:42,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:42,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:42,894 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:42,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2e9562-f0a3-4605-84e0-b2b2a6c58321/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:50:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:44,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 8555 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:50:44,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:44,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:50:45,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405036743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:45,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1171164505] [2022-11-03 02:50:45,060 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-03 02:50:45,060 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:50:45,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:50:45,071 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:50:45,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:52:44,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 551 treesize of output 443 [2022-11-03 02:52:51,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 551 treesize of output 443 [2022-11-03 02:58:12,596 WARN L234 SmtUtils]: Spent 14.98s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 02:58:27,810 WARN L234 SmtUtils]: Spent 15.15s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 02:58:44,150 WARN L234 SmtUtils]: Spent 16.20s on a formula simplification. DAG size of input: 13885 DAG size of output: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 02:58:59,636 WARN L234 SmtUtils]: Spent 15.28s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 02:59:14,897 WARN L234 SmtUtils]: Spent 15.22s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 02:59:31,067 WARN L234 SmtUtils]: Spent 16.11s on a formula simplification. DAG size of input: 13885 DAG size of output: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 02:59:46,682 WARN L234 SmtUtils]: Spent 15.45s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 03:00:02,021 WARN L234 SmtUtils]: Spent 15.30s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 03:00:18,163 WARN L234 SmtUtils]: Spent 16.09s on a formula simplification. DAG size of input: 13885 DAG size of output: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 03:00:33,496 WARN L234 SmtUtils]: Spent 15.22s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 03:00:48,831 WARN L234 SmtUtils]: Spent 15.30s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 03:01:05,095 WARN L234 SmtUtils]: Spent 16.22s on a formula simplification. DAG size of input: 13885 DAG size of output: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)