./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_2a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_2a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF --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 6150b3a515973ce4119efed812e463608b94129eea9915abf4784f091ce6f187 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:40:18,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:40:18,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:40:18,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:40:18,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:40:18,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:40:18,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:40:18,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:40:18,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:40:18,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:40:18,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:40:18,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:40:18,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:40:18,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:40:18,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:40:18,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:40:18,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:40:18,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:40:18,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:40:18,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:40:18,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:40:18,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:40:18,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:40:18,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:40:18,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:40:18,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:40:18,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:40:18,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:40:18,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:40:18,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:40:18,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:40:18,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:40:18,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:40:18,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:40:18,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:40:18,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:40:18,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:40:18,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:40:18,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:40:18,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:40:18,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:40:18,937 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:40:18,991 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:40:18,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:40:18,993 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:40:18,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:40:18,994 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:40:18,994 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:40:18,995 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:40:18,995 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:40:18,995 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:40:18,995 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:40:18,997 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:40:18,997 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:40:18,997 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:40:18,998 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:40:18,998 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:40:18,998 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:40:18,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:40:18,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:40:19,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:40:19,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:40:19,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:40:19,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:40:19,001 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:40:19,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:40:19,001 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:40:19,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:40:19,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:40:19,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:40:19,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:19,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:40:19,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:40:19,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:40:19,006 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:40:19,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:40:19,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:40:19,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:40:19,007 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:40:19,007 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6150b3a515973ce4119efed812e463608b94129eea9915abf4784f091ce6f187 [2021-11-12 23:40:19,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:40:19,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:40:19,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:40:19,413 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:40:19,414 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:40:19,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_2a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:40:19,502 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/data/84ffb505c/6ea8d2023f3e403da29ef56254fd2f9e/FLAG024f04882 [2021-11-12 23:40:20,629 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:40:20,630 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_2a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:40:20,691 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/data/84ffb505c/6ea8d2023f3e403da29ef56254fd2f9e/FLAG024f04882 [2021-11-12 23:40:20,968 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/data/84ffb505c/6ea8d2023f3e403da29ef56254fd2f9e [2021-11-12 23:40:20,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:40:20,972 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:40:20,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:20,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:40:20,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:40:20,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:20" (1/1) ... [2021-11-12 23:40:20,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1360afa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:20, skipping insertion in model container [2021-11-12 23:40:20,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:20" (1/1) ... [2021-11-12 23:40:21,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:40:21,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:40:22,660 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:22,665 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:22,764 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:22,772 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:22,792 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:22,800 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:22,980 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,050 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,119 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,149 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,158 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,163 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,171 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,188 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,223 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,230 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,235 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,242 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,247 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,282 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,295 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,312 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,313 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,313 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,314 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,336 WARN L228 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_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_2a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i[238462,238475] [2021-11-12 23:40:23,345 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,353 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:40:23,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:23,420 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:40:23,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@338ca793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:23, skipping insertion in model container [2021-11-12 23:40:23,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:23,422 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:40:23,425 INFO L158 Benchmark]: Toolchain (without parser) took 2451.51ms. Allocated memory was 117.4MB in the beginning and 155.2MB in the end (delta: 37.7MB). Free memory was 88.7MB in the beginning and 82.6MB in the end (delta: 6.2MB). Peak memory consumption was 48.5MB. Max. memory is 16.1GB. [2021-11-12 23:40:23,425 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 117.4MB. Free memory is still 93.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:40:23,427 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2448.35ms. Allocated memory was 117.4MB in the beginning and 155.2MB in the end (delta: 37.7MB). Free memory was 88.7MB in the beginning and 82.6MB in the end (delta: 6.2MB). Peak memory consumption was 48.5MB. Max. memory is 16.1GB. [2021-11-12 23:40:23,429 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 117.4MB. Free memory is still 93.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2448.35ms. Allocated memory was 117.4MB in the beginning and 155.2MB in the end (delta: 37.7MB). Free memory was 88.7MB in the beginning and 82.6MB in the end (delta: 6.2MB). Peak memory consumption was 48.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4470]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_2a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF --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 6150b3a515973ce4119efed812e463608b94129eea9915abf4784f091ce6f187 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:40:26,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:40:26,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:40:26,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:40:26,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:40:26,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:40:26,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:40:26,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:40:26,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:40:26,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:40:26,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:40:26,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:40:26,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:40:26,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:40:26,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:40:26,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:40:26,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:40:26,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:40:26,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:40:26,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:40:26,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:40:26,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:40:26,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:40:26,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:40:26,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:40:26,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:40:26,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:40:26,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:40:26,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:40:26,293 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:40:26,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:40:26,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:40:26,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:40:26,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:40:26,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:40:26,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:40:26,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:40:26,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:40:26,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:40:26,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:40:26,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:40:26,307 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:40:26,355 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:40:26,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:40:26,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:40:26,357 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:40:26,357 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:40:26,358 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:40:26,358 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:40:26,358 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:40:26,358 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:40:26,359 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:40:26,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:40:26,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:40:26,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:40:26,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:40:26,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:40:26,363 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:40:26,363 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:40:26,363 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:40:26,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:40:26,364 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:40:26,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:40:26,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:40:26,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:40:26,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:40:26,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:26,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:40:26,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:40:26,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:40:26,366 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:40:26,366 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:26,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:40:26,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:40:26,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:40:26,367 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6150b3a515973ce4119efed812e463608b94129eea9915abf4784f091ce6f187 [2021-11-12 23:40:26,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:40:26,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:40:26,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:40:26,848 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:40:26,849 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:40:26,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_2a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:40:26,932 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/data/dc598bffd/9d706791170d44dab1f965cd49f3f7c9/FLAG41d1e9940 [2021-11-12 23:40:28,028 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:40:28,029 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_2a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:40:28,079 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/data/dc598bffd/9d706791170d44dab1f965cd49f3f7c9/FLAG41d1e9940 [2021-11-12 23:40:28,467 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/data/dc598bffd/9d706791170d44dab1f965cd49f3f7c9 [2021-11-12 23:40:28,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:40:28,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:40:28,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:28,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:40:28,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:40:28,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:28" (1/1) ... [2021-11-12 23:40:28,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d2bab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:28, skipping insertion in model container [2021-11-12 23:40:28,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:28" (1/1) ... [2021-11-12 23:40:28,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:40:28,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:40:30,792 WARN L228 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_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_2a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i[238462,238475] [2021-11-12 23:40:30,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:30,904 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:40:30,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:40:31,371 WARN L228 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_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_2a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i[238462,238475] [2021-11-12 23:40:31,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:31,413 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:40:31,834 WARN L228 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_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_2a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i[238462,238475] [2021-11-12 23:40:31,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:32,046 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:40:32,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:32 WrapperNode [2021-11-12 23:40:32,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:32,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:40:32,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:40:32,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:40:32,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:32" (1/1) ... [2021-11-12 23:40:32,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:32" (1/1) ... [2021-11-12 23:40:32,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:40:32,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:40:32,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:40:32,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:40:32,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:32" (1/1) ... [2021-11-12 23:40:32,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:32" (1/1) ... [2021-11-12 23:40:32,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:32" (1/1) ... [2021-11-12 23:40:32,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:32" (1/1) ... [2021-11-12 23:40:32,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:32" (1/1) ... [2021-11-12 23:40:32,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:32" (1/1) ... [2021-11-12 23:40:32,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:32" (1/1) ... [2021-11-12 23:40:32,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:40:32,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:40:32,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:40:32,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:40:32,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:32" (1/1) ... [2021-11-12 23:40:32,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:32,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:40:32,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:40:32,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:40:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:40:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-12 23:40:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-12 23:40:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_12 [2021-11-12 23:40:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_12 [2021-11-12 23:40:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:40:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:40:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:40:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 23:40:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:40:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:40:32,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:40:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 23:40:32,888 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 23:40:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_delete [2021-11-12 23:40:32,888 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_delete [2021-11-12 23:40:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure usb_sg_wait [2021-11-12 23:40:32,889 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_sg_wait [2021-11-12 23:40:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_usb_bulk_msg [2021-11-12 23:40:32,889 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_usb_bulk_msg [2021-11-12 23:40:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-12 23:40:32,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-12 23:40:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion_timeout [2021-11-12 23:40:32,890 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion_timeout [2021-11-12 23:40:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:40:32,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:40:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-11-12 23:40:32,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-11-12 23:40:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2021-11-12 23:40:32,891 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2021-11-12 23:40:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_signal_sdio_irq [2021-11-12 23:40:32,891 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_signal_sdio_irq [2021-11-12 23:40:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_50 [2021-11-12 23:40:32,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_50 [2021-11-12 23:40:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-12 23:40:32,892 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-12 23:40:32,893 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 23:40:32,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 23:40:32,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:40:32,893 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:40:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:40:32,894 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:40:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_detect_change [2021-11-12 23:40:32,894 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_detect_change [2021-11-12 23:40:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-11-12 23:40:32,895 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-11-12 23:40:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure usb_sg_cancel [2021-11-12 23:40:32,895 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_sg_cancel [2021-11-12 23:40:32,896 INFO L130 BoogieDeclarations]: Found specification of procedure usb_sg_init [2021-11-12 23:40:32,896 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_sg_init [2021-11-12 23:40:32,896 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_29 [2021-11-12 23:40:32,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_29 [2021-11-12 23:40:32,898 INFO L130 BoogieDeclarations]: Found specification of procedure __command_read_data [2021-11-12 23:40:32,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __command_read_data [2021-11-12 23:40:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:40:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_27 [2021-11-12 23:40:32,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_27 [2021-11-12 23:40:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-12 23:40:32,900 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-12 23:40:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unlink_urb [2021-11-12 23:40:32,900 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unlink_urb [2021-11-12 23:40:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:40:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_13 [2021-11-12 23:40:32,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_13 [2021-11-12 23:40:32,902 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-12 23:40:32,902 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-12 23:40:32,902 INFO L130 BoogieDeclarations]: Found specification of procedure irqpoll_out_completed [2021-11-12 23:40:32,902 INFO L138 BoogieDeclarations]: Found implementation of procedure irqpoll_out_completed [2021-11-12 23:40:32,903 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_disconnect [2021-11-12 23:40:32,903 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_disconnect [2021-11-12 23:40:32,904 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_3 [2021-11-12 23:40:32,904 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_3 [2021-11-12 23:40:32,904 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_15 [2021-11-12 23:40:32,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_15 [2021-11-12 23:40:32,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:40:32,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:40:32,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:40:32,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:40:32,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:40:32,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:40:32,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 23:40:32,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:40:32,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:40:32,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:40:32,907 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-11-12 23:40:32,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-11-12 23:40:32,907 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-12 23:40:32,908 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-12 23:40:32,908 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_enable_sdio_irq [2021-11-12 23:40:32,908 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_enable_sdio_irq [2021-11-12 23:40:32,909 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-12 23:40:32,910 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-12 23:40:32,910 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-12 23:40:32,910 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-12 23:40:32,911 INFO L130 BoogieDeclarations]: Found specification of procedure add_offloaded_reg [2021-11-12 23:40:32,911 INFO L138 BoogieDeclarations]: Found implementation of procedure add_offloaded_reg [2021-11-12 23:40:32,912 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2021-11-12 23:40:32,912 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2021-11-12 23:40:32,912 INFO L130 BoogieDeclarations]: Found specification of procedure command_out_completed [2021-11-12 23:40:32,912 INFO L138 BoogieDeclarations]: Found implementation of procedure command_out_completed [2021-11-12 23:40:32,912 INFO L130 BoogieDeclarations]: Found specification of procedure roundup_to_multiple_of_64 [2021-11-12 23:40:32,913 INFO L138 BoogieDeclarations]: Found implementation of procedure roundup_to_multiple_of_64 [2021-11-12 23:40:32,913 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2021-11-12 23:40:32,913 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2021-11-12 23:40:32,913 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_cmndwork_thread [2021-11-12 23:40:32,913 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_cmndwork_thread [2021-11-12 23:40:32,914 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_4 [2021-11-12 23:40:32,914 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_4 [2021-11-12 23:40:32,914 INFO L130 BoogieDeclarations]: Found specification of procedure send_command [2021-11-12 23:40:32,915 INFO L138 BoogieDeclarations]: Found implementation of procedure send_command [2021-11-12 23:40:32,915 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2021-11-12 23:40:32,915 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2021-11-12 23:40:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-12 23:40:32,917 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-12 23:40:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:40:32,920 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:40:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-12 23:40:32,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-12 23:40:32,922 INFO L130 BoogieDeclarations]: Found specification of procedure send_irqpoll [2021-11-12 23:40:32,924 INFO L138 BoogieDeclarations]: Found implementation of procedure send_irqpoll [2021-11-12 23:40:32,924 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-12 23:40:32,924 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-12 23:40:32,924 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 23:40:32,931 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 23:40:32,931 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2021-11-12 23:40:32,931 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2021-11-12 23:40:32,932 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_response_error [2021-11-12 23:40:32,932 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_response_error [2021-11-12 23:40:32,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:40:32,932 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_bulk_out [2021-11-12 23:40:32,932 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_bulk_out [2021-11-12 23:40:32,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 23:40:32,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:40:32,933 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_free_host [2021-11-12 23:40:32,933 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_free_host [2021-11-12 23:40:32,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:40:32,933 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 23:40:32,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 23:40:32,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_32 [2021-11-12 23:40:32,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_32 [2021-11-12 23:40:32,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-12 23:40:32,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-12 23:40:32,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:40:32,935 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_queue_poll_work [2021-11-12 23:40:32,935 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_queue_poll_work [2021-11-12 23:40:32,935 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_4 [2021-11-12 23:40:32,935 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_4 [2021-11-12 23:40:32,935 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-12 23:40:32,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-12 23:40:32,936 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2021-11-12 23:40:32,936 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2021-11-12 23:40:32,936 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_bulk_in [2021-11-12 23:40:32,936 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_bulk_in [2021-11-12 23:40:32,936 INFO L130 BoogieDeclarations]: Found specification of procedure sg_copy_to_buffer [2021-11-12 23:40:32,937 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_copy_to_buffer [2021-11-12 23:40:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_put_9 [2021-11-12 23:40:32,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_put_9 [2021-11-12 23:40:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-12 23:40:32,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-12 23:40:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:40:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure __download_offload_pseudocode [2021-11-12 23:40:32,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __download_offload_pseudocode [2021-11-12 23:40:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:40:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_INT~TO~VOID [2021-11-12 23:40:32,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_INT~TO~VOID [2021-11-12 23:40:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 23:40:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:40:32,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:40:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:40:32,939 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_4 [2021-11-12 23:40:32,939 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_4 [2021-11-12 23:40:32,940 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_pollwork_thread [2021-11-12 23:40:32,940 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_pollwork_thread [2021-11-12 23:40:32,940 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_InterfaceNumber [2021-11-12 23:40:32,940 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_InterfaceNumber [2021-11-12 23:40:32,940 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-12 23:40:32,940 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-12 23:40:32,941 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-12 23:40:32,941 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-12 23:40:32,941 INFO L130 BoogieDeclarations]: Found specification of procedure __do_poll [2021-11-12 23:40:32,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __do_poll [2021-11-12 23:40:32,941 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_3 [2021-11-12 23:40:32,941 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_3 [2021-11-12 23:40:32,942 INFO L130 BoogieDeclarations]: Found specification of procedure new_system_port_status [2021-11-12 23:40:32,942 INFO L138 BoogieDeclarations]: Found implementation of procedure new_system_port_status [2021-11-12 23:40:32,942 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_request_done [2021-11-12 23:40:32,942 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_request_done [2021-11-12 23:40:32,942 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-12 23:40:32,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-12 23:40:32,943 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-11-12 23:40:32,943 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-11-12 23:40:32,943 INFO L130 BoogieDeclarations]: Found specification of procedure __command_write_data [2021-11-12 23:40:32,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __command_write_data [2021-11-12 23:40:32,943 INFO L130 BoogieDeclarations]: Found specification of procedure request_firmware [2021-11-12 23:40:32,944 INFO L138 BoogieDeclarations]: Found implementation of procedure request_firmware [2021-11-12 23:40:32,944 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2021-11-12 23:40:32,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2021-11-12 23:40:32,944 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2021-11-12 23:40:32,944 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_47 [2021-11-12 23:40:32,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_47 [2021-11-12 23:40:32,945 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-11-12 23:40:32,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-11-12 23:40:32,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:40:32,945 INFO L130 BoogieDeclarations]: Found specification of procedure usb_string [2021-11-12 23:40:32,945 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_string [2021-11-12 23:40:32,945 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_priv [2021-11-12 23:40:32,946 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_priv [2021-11-12 23:40:32,946 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2021-11-12 23:40:32,946 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2021-11-12 23:40:32,946 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_deadwork_thread [2021-11-12 23:40:32,946 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_deadwork_thread [2021-11-12 23:40:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure check_vub300_port_status [2021-11-12 23:40:32,947 INFO L138 BoogieDeclarations]: Found implementation of procedure check_vub300_port_status [2021-11-12 23:40:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-12 23:40:32,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:40:32,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:40:45,184 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:41:30,054 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:41:30,054 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:41:30,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:41:30 BoogieIcfgContainer [2021-11-12 23:41:30,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:41:30,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:41:30,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:41:30,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:41:30,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:40:28" (1/3) ... [2021-11-12 23:41:30,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fed724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:41:30, skipping insertion in model container [2021-11-12 23:41:30,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:32" (2/3) ... [2021-11-12 23:41:30,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fed724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:41:30, skipping insertion in model container [2021-11-12 23:41:30,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:41:30" (3/3) ... [2021-11-12 23:41:30,068 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-063f96c-1-144_2a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:41:30,074 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:41:30,075 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:41:30,144 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:41:30,151 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:41:30,152 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:41:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand has 1573 states, 1105 states have (on average 1.4) internal successors, (1547), 1170 states have internal predecessors, (1547), 375 states have call successors, (375), 92 states have call predecessors, (375), 91 states have return successors, (366), 340 states have call predecessors, (366), 366 states have call successors, (366) [2021-11-12 23:41:30,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:41:30,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:30,243 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:30,243 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:30,250 INFO L85 PathProgramCache]: Analyzing trace with hash 436074182, now seen corresponding path program 1 times [2021-11-12 23:41:30,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:30,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411370220] [2021-11-12 23:41:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:30,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:30,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:30,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:30,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:41:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:31,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:41:31,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:41:32,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-12 23:41:33,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:33,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411370220] [2021-11-12 23:41:33,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411370220] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:33,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:41:33,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-12 23:41:33,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5127076] [2021-11-12 23:41:33,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:33,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:41:33,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:33,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:41:33,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:41:33,392 INFO L87 Difference]: Start difference. First operand has 1573 states, 1105 states have (on average 1.4) internal successors, (1547), 1170 states have internal predecessors, (1547), 375 states have call successors, (375), 92 states have call predecessors, (375), 91 states have return successors, (366), 340 states have call predecessors, (366), 366 states have call successors, (366) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:41:33,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:33,638 INFO L93 Difference]: Finished difference Result 3141 states and 4625 transitions. [2021-11-12 23:41:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:41:33,641 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2021-11-12 23:41:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:33,682 INFO L225 Difference]: With dead ends: 3141 [2021-11-12 23:41:33,685 INFO L226 Difference]: Without dead ends: 1557 [2021-11-12 23:41:33,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:41:33,713 INFO L933 BasicCegarLoop]: 2280 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.28ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:33,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2280 Invalid, 0 Unknown, 0 Unchecked, 16.28ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:41:33,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-11-12 23:41:33,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1557. [2021-11-12 23:41:33,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1100 states have (on average 1.3909090909090909) internal successors, (1530), 1154 states have internal predecessors, (1530), 366 states have call successors, (366), 91 states have call predecessors, (366), 90 states have return successors, (361), 335 states have call predecessors, (361), 361 states have call successors, (361) [2021-11-12 23:41:34,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 2257 transitions. [2021-11-12 23:41:34,008 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 2257 transitions. Word has length 113 [2021-11-12 23:41:34,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:34,009 INFO L470 AbstractCegarLoop]: Abstraction has 1557 states and 2257 transitions. [2021-11-12 23:41:34,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:41:34,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 2257 transitions. [2021-11-12 23:41:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:41:34,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:34,021 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:34,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 23:41:34,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:34,246 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:34,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:34,247 INFO L85 PathProgramCache]: Analyzing trace with hash -604732482, now seen corresponding path program 1 times [2021-11-12 23:41:34,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:34,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474355949] [2021-11-12 23:41:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:34,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:34,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:34,252 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:34,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:41:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:35,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:41:35,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 23:41:36,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:41:37,926 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:37,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474355949] [2021-11-12 23:41:37,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474355949] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:37,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:41:37,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-12 23:41:37,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180700218] [2021-11-12 23:41:37,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:37,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:41:37,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:37,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:41:37,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:41:37,930 INFO L87 Difference]: Start difference. First operand 1557 states and 2257 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:41:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:38,908 INFO L93 Difference]: Finished difference Result 3108 states and 4509 transitions. [2021-11-12 23:41:38,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:41:38,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2021-11-12 23:41:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:38,930 INFO L225 Difference]: With dead ends: 3108 [2021-11-12 23:41:38,930 INFO L226 Difference]: Without dead ends: 1560 [2021-11-12 23:41:38,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:41:38,941 INFO L933 BasicCegarLoop]: 2248 mSDtfsCounter, 6 mSDsluCounter, 8978 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 550.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 11226 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.38ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 582.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:38,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 11226 Invalid, 55 Unknown, 0 Unchecked, 42.38ms Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 582.66ms Time] [2021-11-12 23:41:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-11-12 23:41:39,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1560. [2021-11-12 23:41:39,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1102 states have (on average 1.3911070780399275) internal successors, (1533), 1157 states have internal predecessors, (1533), 366 states have call successors, (366), 91 states have call predecessors, (366), 91 states have return successors, (365), 335 states have call predecessors, (365), 361 states have call successors, (365) [2021-11-12 23:41:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 2264 transitions. [2021-11-12 23:41:39,055 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 2264 transitions. Word has length 113 [2021-11-12 23:41:39,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:39,058 INFO L470 AbstractCegarLoop]: Abstraction has 1560 states and 2264 transitions. [2021-11-12 23:41:39,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:41:39,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 2264 transitions. [2021-11-12 23:41:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 23:41:39,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:39,074 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:39,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:39,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:39,302 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:39,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:39,304 INFO L85 PathProgramCache]: Analyzing trace with hash 957314536, now seen corresponding path program 1 times [2021-11-12 23:41:39,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:39,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429417525] [2021-11-12 23:41:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:39,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:39,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:39,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:39,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:41:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:40,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:41:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:41:41,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-12 23:41:43,567 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:43,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429417525] [2021-11-12 23:41:43,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429417525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:43,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [482442579] [2021-11-12 23:41:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:43,568 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:43,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:41:43,574 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:41:43,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 23:41:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:44,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:41:44,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:41:48,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:41:49,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [482442579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:49,603 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:41:49,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 13 [2021-11-12 23:41:49,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949997046] [2021-11-12 23:41:49,604 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:49,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:41:49,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:49,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:41:49,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:41:49,607 INFO L87 Difference]: Start difference. First operand 1560 states and 2264 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-12 23:41:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:53,115 INFO L93 Difference]: Finished difference Result 4635 states and 7061 transitions. [2021-11-12 23:41:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:41:53,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 115 [2021-11-12 23:41:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:53,150 INFO L225 Difference]: With dead ends: 4635 [2021-11-12 23:41:53,150 INFO L226 Difference]: Without dead ends: 3098 [2021-11-12 23:41:53,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:41:53,168 INFO L933 BasicCegarLoop]: 2871 mSDtfsCounter, 3797 mSDsluCounter, 2250 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 823 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2633.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3797 SdHoareTripleChecker+Valid, 5121 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.58ms SdHoareTripleChecker+Time, 823 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3195.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:53,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3797 Valid, 5121 Invalid, 843 Unknown, 0 Unchecked, 37.58ms Time], IncrementalHoareTripleChecker [823 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 3195.87ms Time] [2021-11-12 23:41:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-11-12 23:41:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 3083. [2021-11-12 23:41:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 2182 states have (on average 1.3923006416131989) internal successors, (3038), 2287 states have internal predecessors, (3038), 720 states have call successors, (720), 180 states have call predecessors, (720), 180 states have return successors, (853), 663 states have call predecessors, (853), 715 states have call successors, (853) [2021-11-12 23:41:53,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 4611 transitions. [2021-11-12 23:41:53,475 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 4611 transitions. Word has length 115 [2021-11-12 23:41:53,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:53,477 INFO L470 AbstractCegarLoop]: Abstraction has 3083 states and 4611 transitions. [2021-11-12 23:41:53,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-12 23:41:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 4611 transitions. [2021-11-12 23:41:53,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:41:53,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:53,481 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:53,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:53,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:53,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:53,894 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:53,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:53,896 INFO L85 PathProgramCache]: Analyzing trace with hash -388557783, now seen corresponding path program 1 times [2021-11-12 23:41:53,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:53,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125033952] [2021-11-12 23:41:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:53,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:53,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:53,901 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:53,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:41:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:55,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:41:55,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:41:56,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-12 23:41:57,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:57,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125033952] [2021-11-12 23:41:57,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125033952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:57,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [466126722] [2021-11-12 23:41:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:57,749 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:41:57,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:41:57,753 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:41:57,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 23:41:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:58,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:41:58,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:42:02,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:42:03,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [466126722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:03,192 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:42:03,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 13 [2021-11-12 23:42:03,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297106017] [2021-11-12 23:42:03,192 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:03,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:42:03,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:03,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:42:03,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:42:03,195 INFO L87 Difference]: Start difference. First operand 3083 states and 4611 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-12 23:42:13,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:13,544 INFO L93 Difference]: Finished difference Result 12241 states and 19442 transitions. [2021-11-12 23:42:13,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:42:13,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 116 [2021-11-12 23:42:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:13,639 INFO L225 Difference]: With dead ends: 12241 [2021-11-12 23:42:13,639 INFO L226 Difference]: Without dead ends: 9181 [2021-11-12 23:42:13,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:42:13,681 INFO L933 BasicCegarLoop]: 3245 mSDtfsCounter, 4491 mSDsluCounter, 5913 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9008.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4491 SdHoareTripleChecker+Valid, 9158 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.28ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9755.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:13,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4491 Valid, 9158 Invalid, 757 Unknown, 0 Unchecked, 36.28ms Time], IncrementalHoareTripleChecker [19 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 9755.61ms Time] [2021-11-12 23:42:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9181 states. [2021-11-12 23:42:14,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9181 to 9154. [2021-11-12 23:42:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9154 states, 6483 states have (on average 1.3919481721425266) internal successors, (9024), 6790 states have internal predecessors, (9024), 2134 states have call successors, (2134), 536 states have call predecessors, (2134), 536 states have return successors, (2849), 1971 states have call predecessors, (2849), 2129 states have call successors, (2849) [2021-11-12 23:42:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9154 states to 9154 states and 14007 transitions. [2021-11-12 23:42:14,380 INFO L78 Accepts]: Start accepts. Automaton has 9154 states and 14007 transitions. Word has length 116 [2021-11-12 23:42:14,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:14,382 INFO L470 AbstractCegarLoop]: Abstraction has 9154 states and 14007 transitions. [2021-11-12 23:42:14,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-12 23:42:14,384 INFO L276 IsEmpty]: Start isEmpty. Operand 9154 states and 14007 transitions. [2021-11-12 23:42:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 23:42:14,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:14,387 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:14,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:14,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:14,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:14,803 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:14,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:14,803 INFO L85 PathProgramCache]: Analyzing trace with hash 839078155, now seen corresponding path program 1 times [2021-11-12 23:42:14,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:14,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290493977] [2021-11-12 23:42:14,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:14,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:14,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:14,806 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:14,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:42:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:16,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:42:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:42:16,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-12 23:42:18,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:18,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290493977] [2021-11-12 23:42:18,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290493977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:18,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [917148883] [2021-11-12 23:42:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:18,338 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:18,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:42:18,339 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:42:18,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 23:42:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:19,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:42:19,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:42:20,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:42:21,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [917148883] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:21,605 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:42:21,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:42:21,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520329898] [2021-11-12 23:42:21,605 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:21,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:42:21,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:21,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:42:21,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:42:21,607 INFO L87 Difference]: Start difference. First operand 9154 states and 14007 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:42:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:21,897 INFO L93 Difference]: Finished difference Result 9170 states and 14023 transitions. [2021-11-12 23:42:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:42:21,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 117 [2021-11-12 23:42:21,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:21,981 INFO L225 Difference]: With dead ends: 9170 [2021-11-12 23:42:21,981 INFO L226 Difference]: Without dead ends: 9167 [2021-11-12 23:42:21,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:42:21,989 INFO L933 BasicCegarLoop]: 2889 mSDtfsCounter, 2274 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2274 SdHoareTripleChecker+Valid, 5105 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.28ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:21,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2274 Valid, 5105 Invalid, 9 Unknown, 0 Unchecked, 14.28ms Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 63.11ms Time] [2021-11-12 23:42:22,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9167 states. [2021-11-12 23:42:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9167 to 9164. [2021-11-12 23:42:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9164 states, 6493 states have (on average 1.391498536885877) internal successors, (9035), 6798 states have internal predecessors, (9035), 2134 states have call successors, (2134), 536 states have call predecessors, (2134), 536 states have return successors, (2849), 1973 states have call predecessors, (2849), 2129 states have call successors, (2849) [2021-11-12 23:42:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9164 states to 9164 states and 14018 transitions. [2021-11-12 23:42:22,560 INFO L78 Accepts]: Start accepts. Automaton has 9164 states and 14018 transitions. Word has length 117 [2021-11-12 23:42:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:22,561 INFO L470 AbstractCegarLoop]: Abstraction has 9164 states and 14018 transitions. [2021-11-12 23:42:22,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:42:22,561 INFO L276 IsEmpty]: Start isEmpty. Operand 9164 states and 14018 transitions. [2021-11-12 23:42:22,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 23:42:22,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:22,565 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:22,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:22,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:22,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:22,976 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:22,976 INFO L85 PathProgramCache]: Analyzing trace with hash 241091436, now seen corresponding path program 1 times [2021-11-12 23:42:22,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:22,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699494265] [2021-11-12 23:42:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:22,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:22,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:22,979 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:22,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:42:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:42:24,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:42:24,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-12 23:42:26,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:26,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699494265] [2021-11-12 23:42:26,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699494265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:26,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [375402600] [2021-11-12 23:42:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:26,341 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:26,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:42:26,342 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:42:26,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:42:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:27,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:42:27,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:42:28,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:42:29,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [375402600] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:29,602 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:42:29,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:42:29,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657690319] [2021-11-12 23:42:29,603 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:29,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:42:29,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:29,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:42:29,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:42:29,604 INFO L87 Difference]: Start difference. First operand 9164 states and 14018 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:42:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:29,844 INFO L93 Difference]: Finished difference Result 9166 states and 14019 transitions. [2021-11-12 23:42:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:42:29,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 118 [2021-11-12 23:42:29,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:29,914 INFO L225 Difference]: With dead ends: 9166 [2021-11-12 23:42:29,914 INFO L226 Difference]: Without dead ends: 9163 [2021-11-12 23:42:29,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:42:29,923 INFO L933 BasicCegarLoop]: 2254 mSDtfsCounter, 2188 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2188 SdHoareTripleChecker+Valid, 2254 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.66ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:29,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2188 Valid, 2254 Invalid, 1 Unknown, 0 Unchecked, 4.66ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 5.77ms Time] [2021-11-12 23:42:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9163 states. [2021-11-12 23:42:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9163 to 9163. [2021-11-12 23:42:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9163 states, 6493 states have (on average 1.3913445248729401) internal successors, (9034), 6797 states have internal predecessors, (9034), 2133 states have call successors, (2133), 536 states have call predecessors, (2133), 536 states have return successors, (2849), 1973 states have call predecessors, (2849), 2129 states have call successors, (2849) [2021-11-12 23:42:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9163 states to 9163 states and 14016 transitions. [2021-11-12 23:42:30,475 INFO L78 Accepts]: Start accepts. Automaton has 9163 states and 14016 transitions. Word has length 118 [2021-11-12 23:42:30,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:30,476 INFO L470 AbstractCegarLoop]: Abstraction has 9163 states and 14016 transitions. [2021-11-12 23:42:30,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:42:30,477 INFO L276 IsEmpty]: Start isEmpty. Operand 9163 states and 14016 transitions. [2021-11-12 23:42:30,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 23:42:30,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:30,480 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:30,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:30,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:30,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:30,893 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:30,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:30,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1116622802, now seen corresponding path program 1 times [2021-11-12 23:42:30,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:30,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003443180] [2021-11-12 23:42:30,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:30,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:30,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:30,898 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:30,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:42:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:32,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:42:32,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:42:32,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-12 23:42:34,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:34,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003443180] [2021-11-12 23:42:34,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003443180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:34,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1857306763] [2021-11-12 23:42:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:34,484 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:34,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:42:34,484 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:42:34,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 23:42:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:42:35,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:42:37,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:42:37,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1857306763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:37,729 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:42:37,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:42:37,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745608897] [2021-11-12 23:42:37,729 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:37,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:42:37,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:37,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:42:37,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:42:37,731 INFO L87 Difference]: Start difference. First operand 9163 states and 14016 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:42:38,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:38,065 INFO L93 Difference]: Finished difference Result 9165 states and 14017 transitions. [2021-11-12 23:42:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:42:38,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 119 [2021-11-12 23:42:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:38,108 INFO L225 Difference]: With dead ends: 9165 [2021-11-12 23:42:38,108 INFO L226 Difference]: Without dead ends: 9132 [2021-11-12 23:42:38,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:42:38,114 INFO L933 BasicCegarLoop]: 2253 mSDtfsCounter, 2185 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2185 SdHoareTripleChecker+Valid, 2253 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:38,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2185 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 5.32ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:42:38,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9132 states. [2021-11-12 23:42:38,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9132 to 9132. [2021-11-12 23:42:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9132 states, 6476 states have (on average 1.3917541692402717) internal successors, (9013), 6779 states have internal predecessors, (9013), 2120 states have call successors, (2120), 535 states have call predecessors, (2120), 535 states have return successors, (2819), 1961 states have call predecessors, (2819), 2117 states have call successors, (2819) [2021-11-12 23:42:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9132 states to 9132 states and 13952 transitions. [2021-11-12 23:42:38,651 INFO L78 Accepts]: Start accepts. Automaton has 9132 states and 13952 transitions. Word has length 119 [2021-11-12 23:42:38,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:38,652 INFO L470 AbstractCegarLoop]: Abstraction has 9132 states and 13952 transitions. [2021-11-12 23:42:38,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:42:38,652 INFO L276 IsEmpty]: Start isEmpty. Operand 9132 states and 13952 transitions. [2021-11-12 23:42:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 23:42:38,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:38,669 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:38,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:38,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-12 23:42:39,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:39,094 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:39,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:39,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1057649814, now seen corresponding path program 1 times [2021-11-12 23:42:39,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:39,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773662325] [2021-11-12 23:42:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:39,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:39,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:39,097 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:39,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:42:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:40,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:42:40,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-12 23:42:41,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:42:43,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:43,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773662325] [2021-11-12 23:42:43,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773662325] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:43,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1394386076] [2021-11-12 23:42:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:43,347 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:43,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:42:43,348 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:42:43,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:42:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:44,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:42:44,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 23:42:45,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 23:42:46,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1394386076] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:46,179 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:42:46,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:42:46,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104874028] [2021-11-12 23:42:46,180 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:46,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:42:46,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:46,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:42:46,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:42:46,181 INFO L87 Difference]: Start difference. First operand 9132 states and 13952 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 23:42:47,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:47,323 INFO L93 Difference]: Finished difference Result 25889 states and 39640 transitions. [2021-11-12 23:42:47,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:42:47,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 179 [2021-11-12 23:42:47,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:47,409 INFO L225 Difference]: With dead ends: 25889 [2021-11-12 23:42:47,409 INFO L226 Difference]: Without dead ends: 16780 [2021-11-12 23:42:47,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:42:47,462 INFO L933 BasicCegarLoop]: 2674 mSDtfsCounter, 1914 mSDsluCounter, 2166 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 493.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1914 SdHoareTripleChecker+Valid, 4840 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.37ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 532.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:47,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1914 Valid, 4840 Invalid, 24 Unknown, 0 Unchecked, 10.37ms Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 532.43ms Time] [2021-11-12 23:42:47,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16780 states. [2021-11-12 23:42:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16780 to 16748. [2021-11-12 23:42:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16748 states, 11854 states have (on average 1.3976716720094482) internal successors, (16568), 12451 states have internal predecessors, (16568), 3878 states have call successors, (3878), 1015 states have call predecessors, (3878), 1015 states have return successors, (5227), 3563 states have call predecessors, (5227), 3875 states have call successors, (5227) [2021-11-12 23:42:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16748 states to 16748 states and 25673 transitions. [2021-11-12 23:42:48,615 INFO L78 Accepts]: Start accepts. Automaton has 16748 states and 25673 transitions. Word has length 179 [2021-11-12 23:42:48,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:48,616 INFO L470 AbstractCegarLoop]: Abstraction has 16748 states and 25673 transitions. [2021-11-12 23:42:48,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 23:42:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 16748 states and 25673 transitions. [2021-11-12 23:42:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-12 23:42:48,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:48,649 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:48,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:48,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-12 23:42:49,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:49,065 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:49,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:49,066 INFO L85 PathProgramCache]: Analyzing trace with hash 909223889, now seen corresponding path program 1 times [2021-11-12 23:42:49,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:49,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409966558] [2021-11-12 23:42:49,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:49,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:49,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:49,068 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:49,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:42:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:50,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:42:50,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-12 23:42:52,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-11-12 23:42:54,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:54,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409966558] [2021-11-12 23:42:54,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409966558] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:54,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [914358278] [2021-11-12 23:42:54,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:54,207 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:54,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:42:54,212 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:42:54,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:42:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:55,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:42:55,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-12 23:42:56,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-12 23:42:56,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [914358278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:56,772 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:42:56,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:42:56,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101431823] [2021-11-12 23:42:56,773 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:56,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:42:56,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:56,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:42:56,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:42:56,774 INFO L87 Difference]: Start difference. First operand 16748 states and 25673 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 23:42:58,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:59,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:59,768 INFO L93 Difference]: Finished difference Result 33503 states and 51359 transitions. [2021-11-12 23:42:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:42:59,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 217 [2021-11-12 23:42:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:59,946 INFO L225 Difference]: With dead ends: 33503 [2021-11-12 23:42:59,947 INFO L226 Difference]: Without dead ends: 16776 [2021-11-12 23:43:00,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:43:00,085 INFO L933 BasicCegarLoop]: 2250 mSDtfsCounter, 11 mSDsluCounter, 2245 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2108.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4495 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.65ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2139.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:00,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 4495 Invalid, 6 Unknown, 0 Unchecked, 16.65ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2139.01ms Time] [2021-11-12 23:43:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16776 states. [2021-11-12 23:43:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16776 to 16753. [2021-11-12 23:43:01,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16753 states, 11859 states have (on average 1.3973353571127414) internal successors, (16571), 12456 states have internal predecessors, (16571), 3878 states have call successors, (3878), 1015 states have call predecessors, (3878), 1015 states have return successors, (5227), 3563 states have call predecessors, (5227), 3875 states have call successors, (5227) [2021-11-12 23:43:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16753 states to 16753 states and 25676 transitions. [2021-11-12 23:43:01,162 INFO L78 Accepts]: Start accepts. Automaton has 16753 states and 25676 transitions. Word has length 217 [2021-11-12 23:43:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:01,162 INFO L470 AbstractCegarLoop]: Abstraction has 16753 states and 25676 transitions. [2021-11-12 23:43:01,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 23:43:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 16753 states and 25676 transitions. [2021-11-12 23:43:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-12 23:43:01,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:01,195 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:01,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:01,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:01,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:01,609 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:01,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:01,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1267659983, now seen corresponding path program 1 times [2021-11-12 23:43:01,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:01,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604703262] [2021-11-12 23:43:01,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:01,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:01,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:01,614 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:01,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:43:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:03,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:43:03,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 124 proven. 1 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-12 23:43:04,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-12 23:43:06,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:06,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604703262] [2021-11-12 23:43:06,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604703262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:06,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [954983845] [2021-11-12 23:43:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:06,677 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:06,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:43:06,678 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:43:06,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 23:43:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:07,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:43:07,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-12 23:43:09,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-11-12 23:43:10,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [954983845] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:10,418 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:43:10,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-12 23:43:10,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260852601] [2021-11-12 23:43:10,418 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:10,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:43:10,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:10,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:43:10,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:43:10,420 INFO L87 Difference]: Start difference. First operand 16753 states and 25676 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 23:43:12,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:19,691 INFO L93 Difference]: Finished difference Result 38229 states and 58355 transitions. [2021-11-12 23:43:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:43:19,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 234 [2021-11-12 23:43:19,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:19,920 INFO L225 Difference]: With dead ends: 38229 [2021-11-12 23:43:19,920 INFO L226 Difference]: Without dead ends: 21476 [2021-11-12 23:43:19,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 921 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:43:19,980 INFO L933 BasicCegarLoop]: 5359 mSDtfsCounter, 4324 mSDsluCounter, 3075 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 472 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7568.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4324 SdHoareTripleChecker+Valid, 8434 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.53ms SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8245.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:19,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4324 Valid, 8434 Invalid, 1071 Unknown, 0 Unchecked, 23.53ms Time], IncrementalHoareTripleChecker [472 Valid, 598 Invalid, 1 Unknown, 0 Unchecked, 8245.92ms Time] [2021-11-12 23:43:20,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21476 states. [2021-11-12 23:43:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21476 to 21470. [2021-11-12 23:43:21,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21470 states, 15201 states have (on average 1.3968817840931518) internal successors, (21234), 15972 states have internal predecessors, (21234), 4940 states have call successors, (4940), 1328 states have call predecessors, (4940), 1328 states have return successors, (6435), 4519 states have call predecessors, (6435), 4937 states have call successors, (6435) [2021-11-12 23:43:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21470 states to 21470 states and 32609 transitions. [2021-11-12 23:43:21,301 INFO L78 Accepts]: Start accepts. Automaton has 21470 states and 32609 transitions. Word has length 234 [2021-11-12 23:43:21,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:21,302 INFO L470 AbstractCegarLoop]: Abstraction has 21470 states and 32609 transitions. [2021-11-12 23:43:21,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 23:43:21,302 INFO L276 IsEmpty]: Start isEmpty. Operand 21470 states and 32609 transitions. [2021-11-12 23:43:21,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-12 23:43:21,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:21,386 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:21,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:21,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:21,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:21,809 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1753029410, now seen corresponding path program 1 times [2021-11-12 23:43:21,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:21,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915135103] [2021-11-12 23:43:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:21,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:21,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:21,814 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:21,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:43:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:23,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:43:23,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-12 23:43:25,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:43:27,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:27,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915135103] [2021-11-12 23:43:27,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915135103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:27,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [980611634] [2021-11-12 23:43:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:27,453 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:27,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:43:27,454 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:43:27,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:43:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:28,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:43:28,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-12 23:43:30,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-12 23:43:33,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [980611634] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:43:33,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:43:33,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7, 7] total 19 [2021-11-12 23:43:33,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983212382] [2021-11-12 23:43:33,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:33,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:43:33,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:33,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:43:33,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:43:33,813 INFO L87 Difference]: Start difference. First operand 21470 states and 32609 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 4 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-12 23:43:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:34,926 INFO L93 Difference]: Finished difference Result 43067 states and 66735 transitions. [2021-11-12 23:43:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:43:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 4 states have call predecessors, (32), 3 states have call successors, (32) Word has length 275 [2021-11-12 23:43:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:35,021 INFO L225 Difference]: With dead ends: 43067 [2021-11-12 23:43:35,021 INFO L226 Difference]: Without dead ends: 21630 [2021-11-12 23:43:35,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1096 GetRequests, 1079 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:43:35,121 INFO L933 BasicCegarLoop]: 2250 mSDtfsCounter, 4 mSDsluCounter, 6745 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8995 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.51ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:35,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 8995 Invalid, 11 Unknown, 0 Unchecked, 16.51ms Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 74.16ms Time] [2021-11-12 23:43:35,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21630 states. [2021-11-12 23:43:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21630 to 21606. [2021-11-12 23:43:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21606 states, 15297 states have (on average 1.3954370137935543) internal successors, (21346), 16076 states have internal predecessors, (21346), 4956 states have call successors, (4956), 1328 states have call predecessors, (4956), 1352 states have return successors, (6509), 4551 states have call predecessors, (6509), 4953 states have call successors, (6509) [2021-11-12 23:43:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21606 states to 21606 states and 32811 transitions. [2021-11-12 23:43:36,449 INFO L78 Accepts]: Start accepts. Automaton has 21606 states and 32811 transitions. Word has length 275 [2021-11-12 23:43:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:36,449 INFO L470 AbstractCegarLoop]: Abstraction has 21606 states and 32811 transitions. [2021-11-12 23:43:36,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 4 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-12 23:43:36,450 INFO L276 IsEmpty]: Start isEmpty. Operand 21606 states and 32811 transitions. [2021-11-12 23:43:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-12 23:43:36,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:36,521 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:36,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:36,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:36,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:36,962 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:36,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2006698099, now seen corresponding path program 1 times [2021-11-12 23:43:36,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:36,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247502944] [2021-11-12 23:43:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:36,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:36,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:36,967 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:36,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:43:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:38,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1758 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:43:38,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-12 23:43:40,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:43:42,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:42,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247502944] [2021-11-12 23:43:42,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247502944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:42,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [769374133] [2021-11-12 23:43:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:42,353 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:42,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:43:42,357 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:43:42,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 23:43:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:44,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 1758 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:43:44,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-12 23:43:46,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:43:47,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [769374133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:47,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047616949] [2021-11-12 23:43:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:47,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:43:47,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:43:47,844 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:43:47,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-12 23:43:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:48,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1758 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:43:48,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:43:51,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-12 23:43:52,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047616949] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:52,962 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:43:52,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [7, 7, 7, 7] total 18 [2021-11-12 23:43:52,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965405348] [2021-11-12 23:43:52,963 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:52,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:43:52,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:52,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:43:52,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:43:52,964 INFO L87 Difference]: Start difference. First operand 21606 states and 32811 transitions. Second operand has 9 states, 9 states have (on average 30.333333333333332) internal successors, (273), 9 states have internal predecessors, (273), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-12 23:43:55,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:57,060 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:09,950 INFO L93 Difference]: Finished difference Result 43164 states and 65528 transitions. [2021-11-12 23:44:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:09,951 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.333333333333332) internal successors, (273), 9 states have internal predecessors, (273), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 281 [2021-11-12 23:44:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:10,163 INFO L225 Difference]: With dead ends: 43164 [2021-11-12 23:44:10,163 INFO L226 Difference]: Without dead ends: 21591 [2021-11-12 23:44:10,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1681 GetRequests, 1664 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:44:10,213 INFO L933 BasicCegarLoop]: 2126 mSDtfsCounter, 5053 mSDsluCounter, 2527 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 1574 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14988.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5167 SdHoareTripleChecker+Valid, 4653 SdHoareTripleChecker+Invalid, 3056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.73ms SdHoareTripleChecker+Time, 1574 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15714.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:10,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5167 Valid, 4653 Invalid, 3056 Unknown, 0 Unchecked, 31.73ms Time], IncrementalHoareTripleChecker [1574 Valid, 1480 Invalid, 2 Unknown, 0 Unchecked, 15714.74ms Time] [2021-11-12 23:44:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21591 states. [2021-11-12 23:44:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21591 to 21574. [2021-11-12 23:44:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21574 states, 15281 states have (on average 1.3948040049734964) internal successors, (21314), 16060 states have internal predecessors, (21314), 4940 states have call successors, (4940), 1328 states have call predecessors, (4940), 1352 states have return successors, (6469), 4535 states have call predecessors, (6469), 4937 states have call successors, (6469) [2021-11-12 23:44:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21574 states to 21574 states and 32723 transitions. [2021-11-12 23:44:11,176 INFO L78 Accepts]: Start accepts. Automaton has 21574 states and 32723 transitions. Word has length 281 [2021-11-12 23:44:11,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:11,177 INFO L470 AbstractCegarLoop]: Abstraction has 21574 states and 32723 transitions. [2021-11-12 23:44:11,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.333333333333332) internal successors, (273), 9 states have internal predecessors, (273), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-12 23:44:11,177 INFO L276 IsEmpty]: Start isEmpty. Operand 21574 states and 32723 transitions. [2021-11-12 23:44:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-12 23:44:11,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:11,247 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:11,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:11,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-12 23:44:11,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-12 23:44:11,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:11,868 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:11,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:11,868 INFO L85 PathProgramCache]: Analyzing trace with hash 855717754, now seen corresponding path program 1 times [2021-11-12 23:44:11,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:11,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75564859] [2021-11-12 23:44:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:11,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:11,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:11,871 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:11,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:44:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:13,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1760 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:44:13,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-12 23:44:15,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:44:17,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:17,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75564859] [2021-11-12 23:44:17,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75564859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:44:17,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1437880518] [2021-11-12 23:44:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:17,460 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:44:17,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:44:17,461 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:44:17,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 23:44:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:19,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1760 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:44:19,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-12 23:44:21,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:44:23,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1437880518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:44:23,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834424199] [2021-11-12 23:44:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:23,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:44:23,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:44:23,098 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:44:23,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-12 23:44:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:24,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1760 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:44:24,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:44:26,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-12 23:44:28,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834424199] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:44:28,468 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:44:28,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [7, 7, 7, 7] total 18 [2021-11-12 23:44:28,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043434281] [2021-11-12 23:44:28,469 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:28,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:44:28,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:28,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:44:28,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:44:28,470 INFO L87 Difference]: Start difference. First operand 21574 states and 32723 transitions. Second operand has 9 states, 9 states have (on average 30.555555555555557) internal successors, (275), 9 states have internal predecessors, (275), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-12 23:44:30,559 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:32,569 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:45,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:45,707 INFO L93 Difference]: Finished difference Result 43100 states and 65352 transitions. [2021-11-12 23:44:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:45,708 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.555555555555557) internal successors, (275), 9 states have internal predecessors, (275), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 282 [2021-11-12 23:44:45,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:45,794 INFO L225 Difference]: With dead ends: 43100 [2021-11-12 23:44:45,794 INFO L226 Difference]: Without dead ends: 21559 [2021-11-12 23:44:45,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1687 GetRequests, 1670 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:44:45,859 INFO L933 BasicCegarLoop]: 2123 mSDtfsCounter, 2371 mSDsluCounter, 2525 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 121 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14980.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2484 SdHoareTripleChecker+Valid, 4648 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.16ms SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15655.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:45,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2484 Valid, 4648 Invalid, 1599 Unknown, 0 Unchecked, 26.16ms Time], IncrementalHoareTripleChecker [121 Valid, 1476 Invalid, 2 Unknown, 0 Unchecked, 15655.78ms Time] [2021-11-12 23:44:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21559 states. [2021-11-12 23:44:46,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21559 to 21542. [2021-11-12 23:44:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21542 states, 15265 states have (on average 1.3941696691778578) internal successors, (21282), 16044 states have internal predecessors, (21282), 4924 states have call successors, (4924), 1328 states have call predecessors, (4924), 1352 states have return successors, (6429), 4519 states have call predecessors, (6429), 4921 states have call successors, (6429) [2021-11-12 23:44:46,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21542 states to 21542 states and 32635 transitions. [2021-11-12 23:44:46,981 INFO L78 Accepts]: Start accepts. Automaton has 21542 states and 32635 transitions. Word has length 282 [2021-11-12 23:44:46,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:46,982 INFO L470 AbstractCegarLoop]: Abstraction has 21542 states and 32635 transitions. [2021-11-12 23:44:46,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.555555555555557) internal successors, (275), 9 states have internal predecessors, (275), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-12 23:44:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 21542 states and 32635 transitions. [2021-11-12 23:44:47,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-11-12 23:44:47,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:47,028 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:47,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:47,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:47,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:47,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:44:47,630 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:47,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:47,630 INFO L85 PathProgramCache]: Analyzing trace with hash 776711546, now seen corresponding path program 1 times [2021-11-12 23:44:47,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:47,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285947326] [2021-11-12 23:44:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:47,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:47,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:47,634 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:47,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:44:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:49,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:44:49,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-12 23:44:51,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:44:53,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:53,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285947326] [2021-11-12 23:44:53,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285947326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:44:53,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1968473356] [2021-11-12 23:44:53,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:53,230 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:44:53,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:44:53,237 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:44:53,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-12 23:44:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:55,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:44:55,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-12 23:44:57,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:44:59,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1968473356] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:44:59,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783179274] [2021-11-12 23:44:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:59,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:44:59,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:44:59,046 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:44:59,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-12 23:45:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:00,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:45:00,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:45:03,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-12 23:45:05,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783179274] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:05,860 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:45:05,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 9] imperfect sequences [7, 7, 7, 7] total 23 [2021-11-12 23:45:05,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975652300] [2021-11-12 23:45:05,862 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:05,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:45:05,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:45:05,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:45:05,864 INFO L87 Difference]: Start difference. First operand 21542 states and 32635 transitions. Second operand has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-12 23:45:07,973 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:09,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:11,989 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:13,995 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:52,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:52,408 INFO L93 Difference]: Finished difference Result 52116 states and 80428 transitions. [2021-11-12 23:45:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:45:52,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 283 [2021-11-12 23:45:52,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:52,681 INFO L225 Difference]: With dead ends: 52116 [2021-11-12 23:45:52,681 INFO L226 Difference]: Without dead ends: 30607 [2021-11-12 23:45:52,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1700 GetRequests, 1671 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:45:52,735 INFO L933 BasicCegarLoop]: 3139 mSDtfsCounter, 5892 mSDsluCounter, 7048 mSDsCounter, 0 mSdLazyCounter, 4512 mSolverCounterSat, 1573 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40927.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6003 SdHoareTripleChecker+Valid, 10187 SdHoareTripleChecker+Invalid, 6089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 56.76ms SdHoareTripleChecker+Time, 1573 IncrementalHoareTripleChecker+Valid, 4512 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42431.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:52,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6003 Valid, 10187 Invalid, 6089 Unknown, 0 Unchecked, 56.76ms Time], IncrementalHoareTripleChecker [1573 Valid, 4512 Invalid, 4 Unknown, 0 Unchecked, 42431.73ms Time] [2021-11-12 23:45:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30607 states. [2021-11-12 23:45:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30607 to 21510. [2021-11-12 23:45:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21510 states, 15249 states have (on average 1.3935340022296545) internal successors, (21250), 16028 states have internal predecessors, (21250), 4908 states have call successors, (4908), 1328 states have call predecessors, (4908), 1352 states have return successors, (6389), 4503 states have call predecessors, (6389), 4905 states have call successors, (6389) [2021-11-12 23:45:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21510 states to 21510 states and 32547 transitions. [2021-11-12 23:45:54,396 INFO L78 Accepts]: Start accepts. Automaton has 21510 states and 32547 transitions. Word has length 283 [2021-11-12 23:45:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:54,397 INFO L470 AbstractCegarLoop]: Abstraction has 21510 states and 32547 transitions. [2021-11-12 23:45:54,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-12 23:45:54,398 INFO L276 IsEmpty]: Start isEmpty. Operand 21510 states and 32547 transitions. [2021-11-12 23:45:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-12 23:45:54,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:54,454 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:54,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-12 23:45:54,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:54,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-12 23:45:55,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:55,070 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:55,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:55,071 INFO L85 PathProgramCache]: Analyzing trace with hash -292065337, now seen corresponding path program 1 times [2021-11-12 23:45:55,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:55,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706749112] [2021-11-12 23:45:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:55,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:55,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:55,074 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:55,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:45:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:56,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:45:56,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-12 23:45:58,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:46:00,914 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:00,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706749112] [2021-11-12 23:46:00,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706749112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:46:00,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [949227488] [2021-11-12 23:46:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:00,914 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:00,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:46:00,915 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:46:00,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 23:46:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:03,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:46:03,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-12 23:46:05,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:46:06,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [949227488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:46:06,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708443485] [2021-11-12 23:46:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:06,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:46:06,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:46:06,872 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:46:06,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-12 23:46:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:08,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:46:08,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:46:10,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-12 23:46:12,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708443485] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:12,098 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:46:12,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [7, 7, 7, 7] total 18 [2021-11-12 23:46:12,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533717480] [2021-11-12 23:46:12,099 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:12,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:46:12,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:12,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:46:12,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:46:12,100 INFO L87 Difference]: Start difference. First operand 21510 states and 32547 transitions. Second operand has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-12 23:46:14,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:16,311 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:29,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:29,405 INFO L93 Difference]: Finished difference Result 42972 states and 65000 transitions. [2021-11-12 23:46:29,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:29,406 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 284 [2021-11-12 23:46:29,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:29,481 INFO L225 Difference]: With dead ends: 42972 [2021-11-12 23:46:29,481 INFO L226 Difference]: Without dead ends: 21495 [2021-11-12 23:46:29,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1699 GetRequests, 1682 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:46:29,537 INFO L933 BasicCegarLoop]: 2117 mSDtfsCounter, 2621 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 120 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15121.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2732 SdHoareTripleChecker+Valid, 4638 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.02ms SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15781.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:29,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2732 Valid, 4638 Invalid, 1590 Unknown, 0 Unchecked, 20.02ms Time], IncrementalHoareTripleChecker [120 Valid, 1468 Invalid, 2 Unknown, 0 Unchecked, 15781.98ms Time] [2021-11-12 23:46:29,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21495 states. [2021-11-12 23:46:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21495 to 21478. [2021-11-12 23:46:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21478 states, 15233 states have (on average 1.392896999934353) internal successors, (21218), 16012 states have internal predecessors, (21218), 4892 states have call successors, (4892), 1328 states have call predecessors, (4892), 1352 states have return successors, (6349), 4487 states have call predecessors, (6349), 4889 states have call successors, (6349) [2021-11-12 23:46:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21478 states to 21478 states and 32459 transitions. [2021-11-12 23:46:30,818 INFO L78 Accepts]: Start accepts. Automaton has 21478 states and 32459 transitions. Word has length 284 [2021-11-12 23:46:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:30,819 INFO L470 AbstractCegarLoop]: Abstraction has 21478 states and 32459 transitions. [2021-11-12 23:46:30,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-12 23:46:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 21478 states and 32459 transitions. [2021-11-12 23:46:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-12 23:46:30,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:30,854 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:46:30,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-12 23:46:31,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:31,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:31,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:46:31,455 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:31,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:31,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1651499395, now seen corresponding path program 1 times [2021-11-12 23:46:31,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:31,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916714289] [2021-11-12 23:46:31,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:31,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:31,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:31,458 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:31,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:46:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:33,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:46:33,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 124 proven. 1 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-11-12 23:46:35,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-11-12 23:46:37,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:37,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916714289] [2021-11-12 23:46:37,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916714289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:46:37,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [875364911] [2021-11-12 23:46:37,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:37,562 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:37,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:46:37,563 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:46:37,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-12 23:46:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:38,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:38,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2021-11-12 23:46:40,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2021-11-12 23:46:41,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [875364911] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:41,386 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:46:41,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7, 7] total 17 [2021-11-12 23:46:41,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115848709] [2021-11-12 23:46:41,387 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:41,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:46:41,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:41,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:46:41,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:46:41,389 INFO L87 Difference]: Start difference. First operand 21478 states and 32459 transitions. Second operand has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 states have internal predecessors, (138), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-12 23:46:43,572 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:45,581 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:05,601 INFO L93 Difference]: Finished difference Result 78784 states and 121310 transitions. [2021-11-12 23:47:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:47:05,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 states have internal predecessors, (138), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 309 [2021-11-12 23:47:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:05,863 INFO L225 Difference]: With dead ends: 78784 [2021-11-12 23:47:05,863 INFO L226 Difference]: Without dead ends: 62655 [2021-11-12 23:47:05,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1247 GetRequests, 1222 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:47:05,922 INFO L933 BasicCegarLoop]: 4618 mSDtfsCounter, 7045 mSDsluCounter, 16631 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 780 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17867.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7144 SdHoareTripleChecker+Valid, 21249 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 211.25ms SdHoareTripleChecker+Time, 780 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18818.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:05,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7144 Valid, 21249 Invalid, 2367 Unknown, 0 Unchecked, 211.25ms Time], IncrementalHoareTripleChecker [780 Valid, 1585 Invalid, 2 Unknown, 0 Unchecked, 18818.04ms Time] [2021-11-12 23:47:06,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62655 states. [2021-11-12 23:47:10,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62655 to 35088. [2021-11-12 23:47:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35088 states, 24910 states have (on average 1.3935768767563228) internal successors, (34714), 26189 states have internal predecessors, (34714), 8000 states have call successors, (8000), 2138 states have call predecessors, (8000), 2177 states have return successors, (10561), 7318 states have call predecessors, (10561), 7997 states have call successors, (10561) [2021-11-12 23:47:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35088 states to 35088 states and 53275 transitions. [2021-11-12 23:47:10,385 INFO L78 Accepts]: Start accepts. Automaton has 35088 states and 53275 transitions. Word has length 309 [2021-11-12 23:47:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:10,386 INFO L470 AbstractCegarLoop]: Abstraction has 35088 states and 53275 transitions. [2021-11-12 23:47:10,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 states have internal predecessors, (138), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-12 23:47:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 35088 states and 53275 transitions. [2021-11-12 23:47:10,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-12 23:47:10,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:10,439 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:10,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:10,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:10,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:10,840 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:10,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:10,841 INFO L85 PathProgramCache]: Analyzing trace with hash 737064635, now seen corresponding path program 1 times [2021-11-12 23:47:10,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:10,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434837722] [2021-11-12 23:47:10,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:10,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:10,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:10,845 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:10,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 23:47:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:12,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 1778 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:47:12,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 124 proven. 1 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-11-12 23:47:14,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-11-12 23:47:17,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:17,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434837722] [2021-11-12 23:47:17,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434837722] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:17,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2102932732] [2021-11-12 23:47:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:17,014 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:17,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:17,015 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:17,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-12 23:47:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:18,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1778 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:47:18,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-12 23:47:20,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-11-12 23:47:21,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2102932732] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:21,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:47:21,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7, 5] total 17 [2021-11-12 23:47:21,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414701443] [2021-11-12 23:47:21,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:21,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:47:21,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:21,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:47:21,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:47:21,912 INFO L87 Difference]: Start difference. First operand 35088 states and 53275 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 3 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 23:47:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:24,538 INFO L93 Difference]: Finished difference Result 64851 states and 98678 transitions. [2021-11-12 23:47:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:47:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 3 states have call predecessors, (31), 2 states have call successors, (31) Word has length 309 [2021-11-12 23:47:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:24,706 INFO L225 Difference]: With dead ends: 64851 [2021-11-12 23:47:24,706 INFO L226 Difference]: Without dead ends: 35088 [2021-11-12 23:47:24,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1232 GetRequests, 1217 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:47:24,785 INFO L933 BasicCegarLoop]: 2234 mSDtfsCounter, 0 mSDsluCounter, 6696 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 431.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8930 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 441.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:24,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8930 Invalid, 9 Unknown, 0 Unchecked, 10.27ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 441.97ms Time] [2021-11-12 23:47:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35088 states. [2021-11-12 23:47:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35088 to 35088. [2021-11-12 23:47:27,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35088 states, 24910 states have (on average 1.3935768767563228) internal successors, (34714), 26189 states have internal predecessors, (34714), 8000 states have call successors, (8000), 2138 states have call predecessors, (8000), 2177 states have return successors, (10549), 7318 states have call predecessors, (10549), 7997 states have call successors, (10549) [2021-11-12 23:47:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35088 states to 35088 states and 53263 transitions. [2021-11-12 23:47:27,751 INFO L78 Accepts]: Start accepts. Automaton has 35088 states and 53263 transitions. Word has length 309 [2021-11-12 23:47:27,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:27,752 INFO L470 AbstractCegarLoop]: Abstraction has 35088 states and 53263 transitions. [2021-11-12 23:47:27,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 3 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 23:47:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 35088 states and 53263 transitions. [2021-11-12 23:47:27,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-11-12 23:47:27,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:27,794 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:27,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:28,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-11-12 23:47:28,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:28,198 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:28,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1235916756, now seen corresponding path program 1 times [2021-11-12 23:47:28,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:28,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112548457] [2021-11-12 23:47:28,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:28,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:28,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:28,203 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:28,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 23:47:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:29,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:47:29,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 140 proven. 1 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-12 23:47:32,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-12 23:47:35,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:35,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112548457] [2021-11-12 23:47:35,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112548457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:35,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [684773708] [2021-11-12 23:47:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:35,195 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:35,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:35,196 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:35,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-12 23:47:37,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:38,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:47:38,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 140 proven. 1 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-12 23:47:40,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-12 23:47:41,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [684773708] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:41,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073041989] [2021-11-12 23:47:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:41,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:41,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:41,896 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:41,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-12 23:47:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:42,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:47:42,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 140 proven. 1 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-12 23:47:44,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-12 23:47:46,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073041989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:46,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:47:46,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 11 [2021-11-12 23:47:46,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001172201] [2021-11-12 23:47:46,617 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:46,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:47:46,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:46,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:47:46,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:47:46,618 INFO L87 Difference]: Start difference. First operand 35088 states and 53263 transitions. Second operand has 11 states, 9 states have (on average 19.0) internal successors, (171), 11 states have internal predecessors, (171), 4 states have call successors, (62), 2 states have call predecessors, (62), 5 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) [2021-11-12 23:47:50,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:50,198 INFO L93 Difference]: Finished difference Result 70310 states and 106861 transitions. [2021-11-12 23:47:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:47:50,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 19.0) internal successors, (171), 11 states have internal predecessors, (171), 4 states have call successors, (62), 2 states have call predecessors, (62), 5 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) Word has length 315 [2021-11-12 23:47:50,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:50,329 INFO L225 Difference]: With dead ends: 70310 [2021-11-12 23:47:50,329 INFO L226 Difference]: Without dead ends: 35241 [2021-11-12 23:47:50,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1887 GetRequests, 1875 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:47:50,415 INFO L933 BasicCegarLoop]: 2227 mSDtfsCounter, 17 mSDsluCounter, 11113 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 827.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 13340 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.55ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 879.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:50,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 13340 Invalid, 114 Unknown, 0 Unchecked, 16.55ms Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 879.99ms Time] [2021-11-12 23:47:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35241 states. [2021-11-12 23:47:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35241 to 35089. [2021-11-12 23:47:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35089 states, 24911 states have (on average 1.3936012203444261) internal successors, (34716), 26190 states have internal predecessors, (34716), 8000 states have call successors, (8000), 2138 states have call predecessors, (8000), 2177 states have return successors, (10549), 7318 states have call predecessors, (10549), 7997 states have call successors, (10549) [2021-11-12 23:47:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35089 states to 35089 states and 53265 transitions. [2021-11-12 23:47:53,192 INFO L78 Accepts]: Start accepts. Automaton has 35089 states and 53265 transitions. Word has length 315 [2021-11-12 23:47:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:53,193 INFO L470 AbstractCegarLoop]: Abstraction has 35089 states and 53265 transitions. [2021-11-12 23:47:53,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 19.0) internal successors, (171), 11 states have internal predecessors, (171), 4 states have call successors, (62), 2 states have call predecessors, (62), 5 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) [2021-11-12 23:47:53,194 INFO L276 IsEmpty]: Start isEmpty. Operand 35089 states and 53265 transitions. [2021-11-12 23:47:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-11-12 23:47:53,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:53,268 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:53,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:53,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-12 23:47:53,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-11-12 23:47:53,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:53,890 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:53,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:53,890 INFO L85 PathProgramCache]: Analyzing trace with hash 162852994, now seen corresponding path program 2 times [2021-11-12 23:47:53,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:53,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395886532] [2021-11-12 23:47:53,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:47:53,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:53,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:53,894 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:53,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-12 23:49:50,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:49:50,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:49:50,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:49:50,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:49:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 145 proven. 3 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-11-12 23:49:53,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-12 23:49:56,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:49:56,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395886532] [2021-11-12 23:49:56,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395886532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:49:56,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [614305718] [2021-11-12 23:49:56,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:49:56,855 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:49:56,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:49:56,857 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:49:56,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_971678e3-0e32-4ab7-9dfd-7eeb4bf74d8f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process