./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.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_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/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_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/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_04d1be7d-aae8-48bb-94aa-8cd901f280b3/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 2eef4809e0fb5b801f2479dfde07a6f5e1ac3784201f878d167f0654e03bdeae --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:27:31,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:27:31,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:27:31,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:27:31,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:27:31,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:27:31,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:27:31,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:27:31,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:27:31,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:27:31,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:27:32,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:27:32,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:27:32,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:27:32,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:27:32,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:27:32,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:27:32,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:27:32,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:27:32,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:27:32,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:27:32,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:27:32,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:27:32,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:27:32,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:27:32,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:27:32,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:27:32,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:27:32,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:27:32,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:27:32,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:27:32,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:27:32,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:27:32,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:27:32,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:27:32,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:27:32,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:27:32,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:27:32,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:27:32,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:27:32,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:27:32,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:27:32,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:27:32,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:27:32,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:27:32,059 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:27:32,059 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:27:32,060 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:27:32,060 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:27:32,060 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:27:32,060 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:27:32,060 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:27:32,061 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:27:32,061 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:27:32,061 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:27:32,061 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:27:32,062 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:27:32,062 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:27:32,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:27:32,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:27:32,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:27:32,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:27:32,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:27:32,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:27:32,064 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:27:32,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:27:32,064 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:27:32,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:27:32,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:27:32,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:27:32,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:27:32,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:27:32,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:27:32,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:27:32,066 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:27:32,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:27:32,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:27:32,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:27:32,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:27:32,067 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_04d1be7d-aae8-48bb-94aa-8cd901f280b3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2eef4809e0fb5b801f2479dfde07a6f5e1ac3784201f878d167f0654e03bdeae [2021-11-12 23:27:32,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:27:32,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:27:32,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:27:32,326 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:27:32,327 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:27:32,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-11-12 23:27:32,435 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/data/85a3ca5d6/c22d181c483e4750b2d3d16a8d0f4e8c/FLAGc115c14b5 [2021-11-12 23:27:33,372 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:27:33,373 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-11-12 23:27:33,427 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/data/85a3ca5d6/c22d181c483e4750b2d3d16a8d0f4e8c/FLAGc115c14b5 [2021-11-12 23:27:33,783 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/data/85a3ca5d6/c22d181c483e4750b2d3d16a8d0f4e8c [2021-11-12 23:27:33,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:27:33,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:27:33,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:27:33,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:27:33,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:27:33,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:27:33" (1/1) ... [2021-11-12 23:27:33,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bb760ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:33, skipping insertion in model container [2021-11-12 23:27:33,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:27:33" (1/1) ... [2021-11-12 23:27:33,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:27:33,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:27:35,003 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 23:27:35,335 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 23:27:35,421 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 23:27:35,432 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 23:27:35,658 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 23:27:35,671 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 23:27:35,696 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 23:27:35,755 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 23:27:35,916 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 23:27:35,948 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 23:27:35,955 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 23:27:35,957 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 23:27:36,012 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 23:27:36,014 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 23:27:36,027 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 23:27:36,027 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 23:27:36,069 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 23:27:36,074 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 23:27:36,079 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 23:27:36,089 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 23:27:36,094 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 23:27:36,109 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 23:27:36,153 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_04d1be7d-aae8-48bb-94aa-8cd901f280b3/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i[269371,269384] [2021-11-12 23:27:36,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:27:36,360 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 23:27:36,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@d2e9b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:36, skipping insertion in model container [2021-11-12 23:27:36,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:27:36,361 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:27:36,363 INFO L158 Benchmark]: Toolchain (without parser) took 2573.31ms. Allocated memory was 111.1MB in the beginning and 151.0MB in the end (delta: 39.8MB). Free memory was 68.4MB in the beginning and 102.6MB in the end (delta: -34.3MB). Peak memory consumption was 59.3MB. Max. memory is 16.1GB. [2021-11-12 23:27:36,364 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 111.1MB. Free memory is still 67.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:27:36,365 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2570.65ms. Allocated memory was 111.1MB in the beginning and 151.0MB in the end (delta: 39.8MB). Free memory was 68.0MB in the beginning and 102.6MB in the end (delta: -34.6MB). Peak memory consumption was 57.2MB. Max. memory is 16.1GB. [2021-11-12 23:27:36,371 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 111.1MB. Free memory is still 67.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2570.65ms. Allocated memory was 111.1MB in the beginning and 151.0MB in the end (delta: 39.8MB). Free memory was 68.0MB in the beginning and 102.6MB in the end (delta: -34.6MB). Peak memory consumption was 57.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4088]: 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_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/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_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/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_04d1be7d-aae8-48bb-94aa-8cd901f280b3/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 2eef4809e0fb5b801f2479dfde07a6f5e1ac3784201f878d167f0654e03bdeae --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:27:38,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:27:38,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:27:38,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:27:38,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:27:38,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:27:38,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:27:38,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:27:38,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:27:38,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:27:38,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:27:38,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:27:38,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:27:38,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:27:38,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:27:38,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:27:38,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:27:38,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:27:38,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:27:38,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:27:38,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:27:38,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:27:38,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:27:38,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:27:38,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:27:38,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:27:38,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:27:38,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:27:38,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:27:38,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:27:38,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:27:38,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:27:38,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:27:38,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:27:38,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:27:38,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:27:38,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:27:38,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:27:38,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:27:38,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:27:38,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:27:38,739 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:27:38,799 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:27:38,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:27:38,801 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:27:38,801 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:27:38,801 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:27:38,802 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:27:38,802 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:27:38,802 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:27:38,802 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:27:38,803 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:27:38,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:27:38,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:27:38,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:27:38,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:27:38,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:27:38,806 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:27:38,807 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:27:38,807 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:27:38,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:27:38,807 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:27:38,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:27:38,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:27:38,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:27:38,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:27:38,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:27:38,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:27:38,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:27:38,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:27:38,810 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:27:38,810 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:27:38,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:27:38,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:27:38,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:27:38,811 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_04d1be7d-aae8-48bb-94aa-8cd901f280b3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2eef4809e0fb5b801f2479dfde07a6f5e1ac3784201f878d167f0654e03bdeae [2021-11-12 23:27:39,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:27:39,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:27:39,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:27:39,215 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:27:39,216 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:27:39,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-11-12 23:27:39,283 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/data/bde2e6322/e31584916569457aae843a6ceff50df2/FLAG74407bed1 [2021-11-12 23:27:40,257 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:27:40,258 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-11-12 23:27:40,322 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/data/bde2e6322/e31584916569457aae843a6ceff50df2/FLAG74407bed1 [2021-11-12 23:27:40,675 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/data/bde2e6322/e31584916569457aae843a6ceff50df2 [2021-11-12 23:27:40,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:27:40,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:27:40,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:27:40,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:27:40,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:27:40,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:27:40" (1/1) ... [2021-11-12 23:27:40,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e75059b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:40, skipping insertion in model container [2021-11-12 23:27:40,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:27:40" (1/1) ... [2021-11-12 23:27:40,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:27:40,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:27:43,001 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_04d1be7d-aae8-48bb-94aa-8cd901f280b3/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i[269371,269384] [2021-11-12 23:27:43,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:27:43,177 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:27:43,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:27:43,738 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_04d1be7d-aae8-48bb-94aa-8cd901f280b3/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i[269371,269384] [2021-11-12 23:27:43,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:27:43,813 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:27:44,277 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_04d1be7d-aae8-48bb-94aa-8cd901f280b3/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i[269371,269384] [2021-11-12 23:27:44,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:27:44,538 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:27:44,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:44 WrapperNode [2021-11-12 23:27:44,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:27:44,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:27:44,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:27:44,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:27:44,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:44" (1/1) ... [2021-11-12 23:27:44,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:44" (1/1) ... [2021-11-12 23:27:45,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:27:45,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:27:45,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:27:45,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:27:45,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:44" (1/1) ... [2021-11-12 23:27:45,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:44" (1/1) ... [2021-11-12 23:27:45,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:44" (1/1) ... [2021-11-12 23:27:45,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:44" (1/1) ... [2021-11-12 23:27:45,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:44" (1/1) ... [2021-11-12 23:27:45,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:44" (1/1) ... [2021-11-12 23:27:45,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:44" (1/1) ... [2021-11-12 23:27:45,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:27:45,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:27:45,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:27:45,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:27:45,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:44" (1/1) ... [2021-11-12 23:27:45,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:27:45,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:27:45,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:27:45,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:27:45,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:27:45,661 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-12 23:27:45,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:27:45,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:27:45,662 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_del [2021-11-12 23:27:45,662 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_del [2021-11-12 23:27:45,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:27:45,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 23:27:45,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:27:45,662 INFO L130 BoogieDeclarations]: Found specification of procedure driver_remove_file [2021-11-12 23:27:45,662 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_remove_file [2021-11-12 23:27:45,662 INFO L130 BoogieDeclarations]: Found specification of procedure find_partition [2021-11-12 23:27:45,663 INFO L138 BoogieDeclarations]: Found implementation of procedure find_partition [2021-11-12 23:27:45,663 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-12 23:27:45,663 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-12 23:27:45,663 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2021-11-12 23:27:45,663 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2021-11-12 23:27:45,663 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-12 23:27:45,663 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-12 23:27:45,663 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-12 23:27:45,664 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-12 23:27:45,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:27:45,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:27:45,664 INFO L130 BoogieDeclarations]: Found specification of procedure class_unregister [2021-11-12 23:27:45,664 INFO L138 BoogieDeclarations]: Found implementation of procedure class_unregister [2021-11-12 23:27:45,664 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-12 23:27:45,664 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-12 23:27:45,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 23:27:45,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 23:27:45,665 INFO L130 BoogieDeclarations]: Found specification of procedure tape_name [2021-11-12 23:27:45,665 INFO L138 BoogieDeclarations]: Found implementation of procedure tape_name [2021-11-12 23:27:45,665 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-12 23:27:45,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-12 23:27:45,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:27:45,665 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:27:45,666 INFO L130 BoogieDeclarations]: Found specification of procedure st_int_ioctl [2021-11-12 23:27:45,666 INFO L138 BoogieDeclarations]: Found implementation of procedure st_int_ioctl [2021-11-12 23:27:45,666 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_rq_timeout [2021-11-12 23:27:45,666 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_rq_timeout [2021-11-12 23:27:45,667 INFO L130 BoogieDeclarations]: Found specification of procedure set_mode_densblk [2021-11-12 23:27:45,667 INFO L138 BoogieDeclarations]: Found implementation of procedure set_mode_densblk [2021-11-12 23:27:45,667 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-12 23:27:45,667 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-12 23:27:45,667 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_ioctl [2021-11-12 23:27:45,667 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_ioctl [2021-11-12 23:27:45,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:27:45,667 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_st_ref_mutex [2021-11-12 23:27:45,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_st_ref_mutex [2021-11-12 23:27:45,668 INFO L130 BoogieDeclarations]: Found specification of procedure read_mode_page [2021-11-12 23:27:45,668 INFO L138 BoogieDeclarations]: Found implementation of procedure read_mode_page [2021-11-12 23:27:45,668 INFO L130 BoogieDeclarations]: Found specification of procedure do_door_lock [2021-11-12 23:27:45,669 INFO L138 BoogieDeclarations]: Found implementation of procedure do_door_lock [2021-11-12 23:27:45,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:27:45,670 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2021-11-12 23:27:45,670 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2021-11-12 23:27:45,670 INFO L130 BoogieDeclarations]: Found specification of procedure st_do_scsi [2021-11-12 23:27:45,670 INFO L138 BoogieDeclarations]: Found implementation of procedure st_do_scsi [2021-11-12 23:27:45,671 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-12 23:27:45,671 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-12 23:27:45,671 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-12 23:27:45,671 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2021-11-12 23:27:45,671 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2021-11-12 23:27:45,672 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2021-11-12 23:27:45,672 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2021-11-12 23:27:45,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:27:45,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:27:45,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:27:45,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:27:45,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:27:45,673 INFO L130 BoogieDeclarations]: Found specification of procedure st_release_request [2021-11-12 23:27:45,673 INFO L138 BoogieDeclarations]: Found implementation of procedure st_release_request [2021-11-12 23:27:45,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:27:45,674 INFO L130 BoogieDeclarations]: Found specification of procedure remove_cdevs [2021-11-12 23:27:45,674 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_cdevs [2021-11-12 23:27:45,674 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-12 23:27:45,674 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-12 23:27:45,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 23:27:45,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:27:45,674 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-12 23:27:45,674 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-12 23:27:45,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:27:45,675 INFO L130 BoogieDeclarations]: Found specification of procedure get_location [2021-11-12 23:27:45,675 INFO L138 BoogieDeclarations]: Found implementation of procedure get_location [2021-11-12 23:27:45,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:27:45,675 INFO L130 BoogieDeclarations]: Found specification of procedure st_compression [2021-11-12 23:27:45,675 INFO L138 BoogieDeclarations]: Found implementation of procedure st_compression [2021-11-12 23:27:45,676 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_put_device [2021-11-12 23:27:45,676 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_put_device [2021-11-12 23:27:45,676 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-11-12 23:27:45,676 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-11-12 23:27:45,676 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-12 23:27:45,677 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-12 23:27:45,677 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-12 23:27:45,678 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-12 23:27:45,678 INFO L130 BoogieDeclarations]: Found specification of procedure check_tape [2021-11-12 23:27:45,678 INFO L138 BoogieDeclarations]: Found implementation of procedure check_tape [2021-11-12 23:27:45,679 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-12 23:27:45,679 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-12 23:27:45,679 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-12 23:27:45,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-12 23:27:45,679 INFO L130 BoogieDeclarations]: Found specification of procedure switch_partition [2021-11-12 23:27:45,679 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_partition [2021-11-12 23:27:45,679 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_scsi_tape [2021-11-12 23:27:45,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_scsi_tape [2021-11-12 23:27:45,679 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-12 23:27:45,680 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-12 23:27:45,680 INFO L130 BoogieDeclarations]: Found specification of procedure setup_buffering [2021-11-12 23:27:45,680 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_buffering [2021-11-12 23:27:45,680 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-12 23:27:45,680 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-12 23:27:45,680 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_tape_put [2021-11-12 23:27:45,681 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_tape_put [2021-11-12 23:27:45,681 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_cmd_ioctl [2021-11-12 23:27:45,682 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_cmd_ioctl [2021-11-12 23:27:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure create_one_cdev [2021-11-12 23:27:45,684 INFO L138 BoogieDeclarations]: Found implementation of procedure create_one_cdev [2021-11-12 23:27:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure queue_dma_alignment [2021-11-12 23:27:45,684 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_dma_alignment [2021-11-12 23:27:45,685 INFO L130 BoogieDeclarations]: Found specification of procedure do_load_unload [2021-11-12 23:27:45,687 INFO L138 BoogieDeclarations]: Found implementation of procedure do_load_unload [2021-11-12 23:27:45,687 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush_write_buffer [2021-11-12 23:27:45,687 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush_write_buffer [2021-11-12 23:27:45,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:27:45,693 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:27:45,693 INFO L130 BoogieDeclarations]: Found specification of procedure enlarge_buffer [2021-11-12 23:27:45,693 INFO L138 BoogieDeclarations]: Found implementation of procedure enlarge_buffer [2021-11-12 23:27:45,693 INFO L130 BoogieDeclarations]: Found specification of procedure cross_eof [2021-11-12 23:27:45,693 INFO L138 BoogieDeclarations]: Found implementation of procedure cross_eof [2021-11-12 23:27:45,693 INFO L130 BoogieDeclarations]: Found specification of procedure st_chk_result [2021-11-12 23:27:45,693 INFO L138 BoogieDeclarations]: Found implementation of procedure st_chk_result [2021-11-12 23:27:45,693 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2021-11-12 23:27:45,695 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2021-11-12 23:27:45,695 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 23:27:45,695 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 23:27:45,695 INFO L130 BoogieDeclarations]: Found specification of procedure write_behind_check [2021-11-12 23:27:45,695 INFO L138 BoogieDeclarations]: Found implementation of procedure write_behind_check [2021-11-12 23:27:45,695 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-12 23:27:45,695 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-12 23:27:45,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:27:45,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 23:27:45,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:27:45,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:27:45,696 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-12 23:27:45,696 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-12 23:27:45,696 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 23:27:45,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 23:27:45,696 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_st_ref_mutex [2021-11-12 23:27:45,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_st_ref_mutex [2021-11-12 23:27:45,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:27:45,696 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-12 23:27:45,696 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-12 23:27:45,697 INFO L130 BoogieDeclarations]: Found specification of procedure flush_buffer [2021-11-12 23:27:45,697 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_buffer [2021-11-12 23:27:45,697 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2021-11-12 23:27:45,697 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2021-11-12 23:27:45,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:27:45,697 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-12 23:27:45,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:27:45,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 23:27:45,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:27:45,697 INFO L130 BoogieDeclarations]: Found specification of procedure driver_create_file [2021-11-12 23:27:45,698 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_create_file [2021-11-12 23:27:45,698 INFO L130 BoogieDeclarations]: Found specification of procedure release_buffering [2021-11-12 23:27:45,698 INFO L138 BoogieDeclarations]: Found implementation of procedure release_buffering [2021-11-12 23:27:45,698 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2021-11-12 23:27:45,698 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2021-11-12 23:27:45,698 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_buffer [2021-11-12 23:27:45,698 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_buffer [2021-11-12 23:27:45,698 INFO L130 BoogieDeclarations]: Found specification of procedure write_mode_page [2021-11-12 23:27:45,698 INFO L138 BoogieDeclarations]: Found implementation of procedure write_mode_page [2021-11-12 23:27:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-12 23:27:45,699 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-12 23:27:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure rw_checks [2021-11-12 23:27:45,699 INFO L138 BoogieDeclarations]: Found implementation of procedure rw_checks [2021-11-12 23:27:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2021-11-12 23:27:45,699 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2021-11-12 23:27:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2021-11-12 23:27:45,699 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2021-11-12 23:27:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_lock_of_scsi_tape [2021-11-12 23:27:45,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_lock_of_scsi_tape [2021-11-12 23:27:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-12 23:27:45,700 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-12 23:27:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:27:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_get_device [2021-11-12 23:27:45,700 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_get_device [2021-11-12 23:27:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure set_location [2021-11-12 23:27:45,700 INFO L138 BoogieDeclarations]: Found implementation of procedure set_location [2021-11-12 23:27:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:27:45,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:29:12,309 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:29:12,310 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:29:12,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:29:12 BoogieIcfgContainer [2021-11-12 23:29:12,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:29:12,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:29:12,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:29:12,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:29:12,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:27:40" (1/3) ... [2021-11-12 23:29:12,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec0cd87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:29:12, skipping insertion in model container [2021-11-12 23:29:12,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:44" (2/3) ... [2021-11-12 23:29:12,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec0cd87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:29:12, skipping insertion in model container [2021-11-12 23:29:12,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:29:12" (3/3) ... [2021-11-12 23:29:12,324 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-11-12 23:29:12,329 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:29:12,330 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:29:12,385 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:29:12,392 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 23:29:12,392 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:29:12,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 2115 states, 1690 states have (on average 1.485207100591716) internal successors, (2510), 1712 states have internal predecessors, (2510), 345 states have call successors, (345), 78 states have call predecessors, (345), 78 states have return successors, (345), 345 states have call predecessors, (345), 345 states have call successors, (345) [2021-11-12 23:29:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-12 23:29:12,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:12,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:12,475 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:12,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:12,479 INFO L85 PathProgramCache]: Analyzing trace with hash 138079915, now seen corresponding path program 1 times [2021-11-12 23:29:12,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:12,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727276783] [2021-11-12 23:29:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:12,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:12,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:12,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:12,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:29:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:16,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:16,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:16,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:16,672 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:16,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727276783] [2021-11-12 23:29:16,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727276783] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:16,673 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:16,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 23:29:16,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150812843] [2021-11-12 23:29:16,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:16,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:29:16,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:29:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:29:16,713 INFO L87 Difference]: Start difference. First operand has 2115 states, 1690 states have (on average 1.485207100591716) internal successors, (2510), 1712 states have internal predecessors, (2510), 345 states have call successors, (345), 78 states have call predecessors, (345), 78 states have return successors, (345), 345 states have call predecessors, (345), 345 states have call successors, (345) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:29:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:17,022 INFO L93 Difference]: Finished difference Result 4222 states and 6502 transitions. [2021-11-12 23:29:17,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:17,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-12 23:29:17,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:17,070 INFO L225 Difference]: With dead ends: 4222 [2021-11-12 23:29:17,071 INFO L226 Difference]: Without dead ends: 2109 [2021-11-12 23:29:17,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:29:17,094 INFO L933 BasicCegarLoop]: 3187 mSDtfsCounter, 3182 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3182 SdHoareTripleChecker+Valid, 3187 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.56ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:17,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3182 Valid, 3187 Invalid, 2 Unknown, 0 Unchecked, 26.56ms Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 9.53ms Time] [2021-11-12 23:29:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-11-12 23:29:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2109. [2021-11-12 23:29:17,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 1686 states have (on average 1.4839857651245552) internal successors, (2502), 1706 states have internal predecessors, (2502), 345 states have call successors, (345), 78 states have call predecessors, (345), 77 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2021-11-12 23:29:17,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 3184 transitions. [2021-11-12 23:29:17,319 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 3184 transitions. Word has length 18 [2021-11-12 23:29:17,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:17,320 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 3184 transitions. [2021-11-12 23:29:17,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:29:17,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 3184 transitions. [2021-11-12 23:29:17,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-12 23:29:17,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:17,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:17,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 23:29:17,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:17,551 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash 839144493, now seen corresponding path program 1 times [2021-11-12 23:29:17,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:17,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643226458] [2021-11-12 23:29:17,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:17,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:17,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:17,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:17,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:29:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:21,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:21,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:21,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:21,591 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:21,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643226458] [2021-11-12 23:29:21,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643226458] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:21,591 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:21,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:29:21,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218753651] [2021-11-12 23:29:21,592 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:21,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:29:21,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:29:21,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:29:21,594 INFO L87 Difference]: Start difference. First operand 2109 states and 3184 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:29:23,787 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:29:23,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:23,962 INFO L93 Difference]: Finished difference Result 2111 states and 3185 transitions. [2021-11-12 23:29:23,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:23,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-12 23:29:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:23,981 INFO L225 Difference]: With dead ends: 2111 [2021-11-12 23:29:23,982 INFO L226 Difference]: Without dead ends: 2108 [2021-11-12 23:29:23,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:29:23,985 INFO L933 BasicCegarLoop]: 3181 mSDtfsCounter, 3167 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2197.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3167 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2265.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:23,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3167 Valid, 3181 Invalid, 2 Unknown, 0 Unchecked, 12.01ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2265.35ms Time] [2021-11-12 23:29:23,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-11-12 23:29:24,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2108. [2021-11-12 23:29:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 1686 states have (on average 1.4833926453143536) internal successors, (2501), 1705 states have internal predecessors, (2501), 344 states have call successors, (344), 78 states have call predecessors, (344), 77 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2021-11-12 23:29:24,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3182 transitions. [2021-11-12 23:29:24,184 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3182 transitions. Word has length 18 [2021-11-12 23:29:24,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:24,185 INFO L470 AbstractCegarLoop]: Abstraction has 2108 states and 3182 transitions. [2021-11-12 23:29:24,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:29:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3182 transitions. [2021-11-12 23:29:24,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-12 23:29:24,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:24,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:24,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 23:29:24,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:24,407 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:24,408 INFO L85 PathProgramCache]: Analyzing trace with hash 242977281, now seen corresponding path program 1 times [2021-11-12 23:29:24,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:24,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632525707] [2021-11-12 23:29:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:24,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:24,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:24,411 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:24,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:29:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:27,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:27,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:28,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:28,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:28,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632525707] [2021-11-12 23:29:28,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632525707] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:28,277 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:28,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:29:28,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437685881] [2021-11-12 23:29:28,277 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:28,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:29:28,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:28,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:29:28,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:29:28,279 INFO L87 Difference]: Start difference. First operand 2108 states and 3182 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:29:30,472 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:29:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:30,838 INFO L93 Difference]: Finished difference Result 6200 states and 9372 transitions. [2021-11-12 23:29:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:30,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-12 23:29:30,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:30,878 INFO L225 Difference]: With dead ends: 6200 [2021-11-12 23:29:30,878 INFO L226 Difference]: Without dead ends: 4133 [2021-11-12 23:29:30,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:29:30,893 INFO L933 BasicCegarLoop]: 4118 mSDtfsCounter, 3162 mSDsluCounter, 3058 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2256.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3162 SdHoareTripleChecker+Valid, 7176 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.08ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2314.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:30,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3162 Valid, 7176 Invalid, 14 Unknown, 0 Unchecked, 23.08ms Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 2314.59ms Time] [2021-11-12 23:29:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-11-12 23:29:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 4128. [2021-11-12 23:29:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 3314 states have (on average 1.4849124924562462) internal successors, (4921), 3345 states have internal predecessors, (4921), 662 states have call successors, (662), 153 states have call predecessors, (662), 151 states have return successors, (657), 651 states have call predecessors, (657), 651 states have call successors, (657) [2021-11-12 23:29:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 6240 transitions. [2021-11-12 23:29:31,106 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 6240 transitions. Word has length 19 [2021-11-12 23:29:31,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:31,107 INFO L470 AbstractCegarLoop]: Abstraction has 4128 states and 6240 transitions. [2021-11-12 23:29:31,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:29:31,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 6240 transitions. [2021-11-12 23:29:31,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 23:29:31,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:31,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:31,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:31,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:31,323 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:31,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:31,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1058332240, now seen corresponding path program 1 times [2021-11-12 23:29:31,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:31,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917963763] [2021-11-12 23:29:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:31,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:31,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:31,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:31,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:29:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:34,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1389 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:34,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:35,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:35,282 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:35,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917963763] [2021-11-12 23:29:35,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917963763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:35,282 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:35,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:29:35,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632495420] [2021-11-12 23:29:35,283 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:35,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:29:35,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:35,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:29:35,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:29:35,285 INFO L87 Difference]: Start difference. First operand 4128 states and 6240 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:29:37,483 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:29:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:37,688 INFO L93 Difference]: Finished difference Result 4130 states and 6241 transitions. [2021-11-12 23:29:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:37,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-12 23:29:37,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:37,724 INFO L225 Difference]: With dead ends: 4130 [2021-11-12 23:29:37,724 INFO L226 Difference]: Without dead ends: 4127 [2021-11-12 23:29:37,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:29:37,729 INFO L933 BasicCegarLoop]: 3179 mSDtfsCounter, 3163 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2200.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3163 SdHoareTripleChecker+Valid, 3179 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.96ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2252.96ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:37,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3163 Valid, 3179 Invalid, 2 Unknown, 0 Unchecked, 10.96ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2252.96ms Time] [2021-11-12 23:29:37,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-11-12 23:29:37,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 4127. [2021-11-12 23:29:37,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4127 states, 3314 states have (on average 1.4846107423053712) internal successors, (4920), 3344 states have internal predecessors, (4920), 661 states have call successors, (661), 153 states have call predecessors, (661), 151 states have return successors, (657), 651 states have call predecessors, (657), 651 states have call successors, (657) [2021-11-12 23:29:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4127 states to 4127 states and 6238 transitions. [2021-11-12 23:29:37,946 INFO L78 Accepts]: Start accepts. Automaton has 4127 states and 6238 transitions. Word has length 20 [2021-11-12 23:29:37,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:37,946 INFO L470 AbstractCegarLoop]: Abstraction has 4127 states and 6238 transitions. [2021-11-12 23:29:37,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:29:37,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4127 states and 6238 transitions. [2021-11-12 23:29:37,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 23:29:37,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:37,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:37,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:38,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:38,171 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1550750436, now seen corresponding path program 1 times [2021-11-12 23:29:38,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:38,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165661074] [2021-11-12 23:29:38,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:38,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:38,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:38,175 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:38,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:29:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:41,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 1390 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:41,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:41,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:42,005 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:42,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165661074] [2021-11-12 23:29:42,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165661074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:42,005 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:42,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:29:42,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341807636] [2021-11-12 23:29:42,006 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:42,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:29:42,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:42,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:29:42,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:29:42,007 INFO L87 Difference]: Start difference. First operand 4127 states and 6238 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:29:44,202 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:29:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:44,461 INFO L93 Difference]: Finished difference Result 4199 states and 6296 transitions. [2021-11-12 23:29:44,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:44,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-11-12 23:29:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:44,499 INFO L225 Difference]: With dead ends: 4199 [2021-11-12 23:29:44,499 INFO L226 Difference]: Without dead ends: 4178 [2021-11-12 23:29:44,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:29:44,505 INFO L933 BasicCegarLoop]: 3181 mSDtfsCounter, 2998 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2224.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2998 SdHoareTripleChecker+Valid, 3366 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.81ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2295.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:44,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2998 Valid, 3366 Invalid, 7 Unknown, 0 Unchecked, 9.81ms Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2295.14ms Time] [2021-11-12 23:29:44,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2021-11-12 23:29:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 4176. [2021-11-12 23:29:44,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4176 states, 3357 states have (on average 1.4769139112302652) internal successors, (4958), 3385 states have internal predecessors, (4958), 651 states have call successors, (651), 169 states have call predecessors, (651), 167 states have return successors, (649), 643 states have call predecessors, (649), 643 states have call successors, (649) [2021-11-12 23:29:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 6258 transitions. [2021-11-12 23:29:44,796 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 6258 transitions. Word has length 21 [2021-11-12 23:29:44,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:44,796 INFO L470 AbstractCegarLoop]: Abstraction has 4176 states and 6258 transitions. [2021-11-12 23:29:44,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:29:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 6258 transitions. [2021-11-12 23:29:44,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 23:29:44,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:44,805 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:44,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:45,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:45,027 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:45,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:45,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1666647660, now seen corresponding path program 1 times [2021-11-12 23:29:45,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:45,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906042391] [2021-11-12 23:29:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:45,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:45,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:45,030 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:45,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:29:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:48,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1532 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:29:48,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:49,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:29:49,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:49,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906042391] [2021-11-12 23:29:49,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906042391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:49,423 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:49,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 23:29:49,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114680860] [2021-11-12 23:29:49,423 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:49,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:29:49,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:49,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:29:49,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:29:49,425 INFO L87 Difference]: Start difference. First operand 4176 states and 6258 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:29:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:49,760 INFO L93 Difference]: Finished difference Result 8301 states and 12450 transitions. [2021-11-12 23:29:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:29:49,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 61 [2021-11-12 23:29:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:49,797 INFO L225 Difference]: With dead ends: 8301 [2021-11-12 23:29:49,797 INFO L226 Difference]: Without dead ends: 4176 [2021-11-12 23:29:49,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:29:49,824 INFO L933 BasicCegarLoop]: 3172 mSDtfsCounter, 1 mSDsluCounter, 6338 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9510 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.80ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:49,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 9510 Invalid, 8 Unknown, 0 Unchecked, 15.80ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 63.21ms Time] [2021-11-12 23:29:49,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-11-12 23:29:50,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 4176. [2021-11-12 23:29:50,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4176 states, 3357 states have (on average 1.4766160262138814) internal successors, (4957), 3385 states have internal predecessors, (4957), 651 states have call successors, (651), 169 states have call predecessors, (651), 167 states have return successors, (649), 643 states have call predecessors, (649), 643 states have call successors, (649) [2021-11-12 23:29:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 6257 transitions. [2021-11-12 23:29:50,122 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 6257 transitions. Word has length 61 [2021-11-12 23:29:50,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:50,123 INFO L470 AbstractCegarLoop]: Abstraction has 4176 states and 6257 transitions. [2021-11-12 23:29:50,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:29:50,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 6257 transitions. [2021-11-12 23:29:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:29:50,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:50,128 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:29:50,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:50,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:50,343 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:50,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:50,343 INFO L85 PathProgramCache]: Analyzing trace with hash -517621178, now seen corresponding path program 1 times [2021-11-12 23:29:50,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:50,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704689228] [2021-11-12 23:29:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:50,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:50,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:50,346 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:50,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:29:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:29:53,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:54,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:29:54,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:54,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704689228] [2021-11-12 23:29:54,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704689228] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:54,799 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:54,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 23:29:54,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95987765] [2021-11-12 23:29:54,800 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:54,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:29:54,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:54,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:29:54,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:29:54,801 INFO L87 Difference]: Start difference. First operand 4176 states and 6257 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 23:29:55,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:55,306 INFO L93 Difference]: Finished difference Result 8301 states and 12449 transitions. [2021-11-12 23:29:55,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:29:55,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2021-11-12 23:29:55,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:55,362 INFO L225 Difference]: With dead ends: 8301 [2021-11-12 23:29:55,362 INFO L226 Difference]: Without dead ends: 4163 [2021-11-12 23:29:55,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:29:55,385 INFO L933 BasicCegarLoop]: 3170 mSDtfsCounter, 3 mSDsluCounter, 9492 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12662 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.20ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.70ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:55,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12662 Invalid, 20 Unknown, 0 Unchecked, 18.20ms Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 144.70ms Time] [2021-11-12 23:29:55,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4163 states. [2021-11-12 23:29:55,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4163 to 4163. [2021-11-12 23:29:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4163 states, 3350 states have (on average 1.4767164179104477) internal successors, (4947), 3376 states have internal predecessors, (4947), 648 states have call successors, (648), 166 states have call predecessors, (648), 164 states have return successors, (646), 640 states have call predecessors, (646), 640 states have call successors, (646) [2021-11-12 23:29:55,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 6241 transitions. [2021-11-12 23:29:55,605 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 6241 transitions. Word has length 68 [2021-11-12 23:29:55,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:55,605 INFO L470 AbstractCegarLoop]: Abstraction has 4163 states and 6241 transitions. [2021-11-12 23:29:55,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 23:29:55,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 6241 transitions. [2021-11-12 23:29:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:29:55,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:55,611 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:29:55,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:55,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:55,835 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash -252154144, now seen corresponding path program 1 times [2021-11-12 23:29:55,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:55,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355845071] [2021-11-12 23:29:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:55,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:55,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:55,838 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:55,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:29:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:59,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1568 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:29:59,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:59,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:30:00,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:00,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355845071] [2021-11-12 23:30:00,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355845071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:00,203 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:00,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 23:30:00,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162463300] [2021-11-12 23:30:00,203 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:00,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:30:00,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:00,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:30:00,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:30:00,205 INFO L87 Difference]: Start difference. First operand 4163 states and 6241 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:30:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:00,569 INFO L93 Difference]: Finished difference Result 8290 states and 12435 transitions. [2021-11-12 23:30:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:30:00,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2021-11-12 23:30:00,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:00,592 INFO L225 Difference]: With dead ends: 8290 [2021-11-12 23:30:00,592 INFO L226 Difference]: Without dead ends: 4163 [2021-11-12 23:30:00,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:30:00,612 INFO L933 BasicCegarLoop]: 3161 mSDtfsCounter, 1 mSDsluCounter, 6310 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9471 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.47ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:00,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 9471 Invalid, 14 Unknown, 0 Unchecked, 13.47ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 110.89ms Time] [2021-11-12 23:30:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4163 states. [2021-11-12 23:30:00,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4163 to 4163. [2021-11-12 23:30:00,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4163 states, 3350 states have (on average 1.4764179104477613) internal successors, (4946), 3376 states have internal predecessors, (4946), 648 states have call successors, (648), 166 states have call predecessors, (648), 164 states have return successors, (646), 640 states have call predecessors, (646), 640 states have call successors, (646) [2021-11-12 23:30:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 6240 transitions. [2021-11-12 23:30:00,824 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 6240 transitions. Word has length 73 [2021-11-12 23:30:00,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:00,824 INFO L470 AbstractCegarLoop]: Abstraction has 4163 states and 6240 transitions. [2021-11-12 23:30:00,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:30:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 6240 transitions. [2021-11-12 23:30:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 23:30:00,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:00,828 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:30:00,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:01,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:01,043 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:01,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:01,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1320600162, now seen corresponding path program 1 times [2021-11-12 23:30:01,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:01,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979074624] [2021-11-12 23:30:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:01,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:01,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:01,047 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:01,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:30:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:04,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:30:04,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:30:05,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:30:05,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:05,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979074624] [2021-11-12 23:30:05,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979074624] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:05,470 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:05,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 23:30:05,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521158159] [2021-11-12 23:30:05,470 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:05,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:30:05,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:05,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:30:05,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:30:05,472 INFO L87 Difference]: Start difference. First operand 4163 states and 6240 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 23:30:05,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:05,974 INFO L93 Difference]: Finished difference Result 8290 states and 12434 transitions. [2021-11-12 23:30:05,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:30:05,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 84 [2021-11-12 23:30:05,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:06,002 INFO L225 Difference]: With dead ends: 8290 [2021-11-12 23:30:06,003 INFO L226 Difference]: Without dead ends: 4156 [2021-11-12 23:30:06,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:30:06,023 INFO L933 BasicCegarLoop]: 3159 mSDtfsCounter, 3 mSDsluCounter, 9453 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 180.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12612 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.87ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 187.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:06,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12612 Invalid, 26 Unknown, 0 Unchecked, 17.87ms Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 187.56ms Time] [2021-11-12 23:30:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2021-11-12 23:30:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 4156. [2021-11-12 23:30:06,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4156 states, 3347 states have (on average 1.475948610696146) internal successors, (4940), 3371 states have internal predecessors, (4940), 645 states have call successors, (645), 165 states have call predecessors, (645), 163 states have return successors, (643), 637 states have call predecessors, (643), 637 states have call successors, (643) [2021-11-12 23:30:06,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4156 states to 4156 states and 6228 transitions. [2021-11-12 23:30:06,212 INFO L78 Accepts]: Start accepts. Automaton has 4156 states and 6228 transitions. Word has length 84 [2021-11-12 23:30:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:06,212 INFO L470 AbstractCegarLoop]: Abstraction has 4156 states and 6228 transitions. [2021-11-12 23:30:06,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 23:30:06,212 INFO L276 IsEmpty]: Start isEmpty. Operand 4156 states and 6228 transitions. [2021-11-12 23:30:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 23:30:06,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:06,217 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-12 23:30:06,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:06,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:06,430 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash 137726031, now seen corresponding path program 1 times [2021-11-12 23:30:06,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:06,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322414979] [2021-11-12 23:30:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:06,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:06,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:06,434 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:06,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:30:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:09,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:30:09,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:30:10,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:30:11,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:11,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322414979] [2021-11-12 23:30:11,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322414979] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:11,107 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:11,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 23:30:11,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479453115] [2021-11-12 23:30:11,108 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:11,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:30:11,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:11,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:30:11,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:30:11,109 INFO L87 Difference]: Start difference. First operand 4156 states and 6228 transitions. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 8 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:30:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:13,516 INFO L93 Difference]: Finished difference Result 7554 states and 11586 transitions. [2021-11-12 23:30:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:13,517 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 8 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 91 [2021-11-12 23:30:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:13,553 INFO L225 Difference]: With dead ends: 7554 [2021-11-12 23:30:13,553 INFO L226 Difference]: Without dead ends: 6531 [2021-11-12 23:30:13,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:30:13,563 INFO L933 BasicCegarLoop]: 4665 mSDtfsCounter, 2970 mSDsluCounter, 22010 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1771.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3120 SdHoareTripleChecker+Valid, 26675 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.67ms SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1951.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:13,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3120 Valid, 26675 Invalid, 621 Unknown, 0 Unchecked, 41.67ms Time], IncrementalHoareTripleChecker [448 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 1951.43ms Time] [2021-11-12 23:30:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6531 states. [2021-11-12 23:30:13,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6531 to 3838. [2021-11-12 23:30:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3069 states have (on average 1.4623655913978495) internal successors, (4488), 3091 states have internal predecessors, (4488), 606 states have call successors, (606), 164 states have call predecessors, (606), 162 states have return successors, (606), 600 states have call predecessors, (606), 600 states have call successors, (606) [2021-11-12 23:30:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 5700 transitions. [2021-11-12 23:30:13,807 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 5700 transitions. Word has length 91 [2021-11-12 23:30:13,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:13,808 INFO L470 AbstractCegarLoop]: Abstraction has 3838 states and 5700 transitions. [2021-11-12 23:30:13,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 8 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:30:13,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 5700 transitions. [2021-11-12 23:30:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 23:30:13,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:13,811 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-12 23:30:13,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:14,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:14,035 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:14,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:14,035 INFO L85 PathProgramCache]: Analyzing trace with hash 982197902, now seen corresponding path program 1 times [2021-11-12 23:30:14,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:14,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945694877] [2021-11-12 23:30:14,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:14,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:14,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:14,038 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:14,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:30:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:17,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:30:17,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:30:17,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:30:18,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:18,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945694877] [2021-11-12 23:30:18,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945694877] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:18,274 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:18,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:30:18,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851917372] [2021-11-12 23:30:18,275 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:18,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:30:18,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:18,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:30:18,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:30:18,276 INFO L87 Difference]: Start difference. First operand 3838 states and 5700 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:20,477 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:20,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:20,753 INFO L93 Difference]: Finished difference Result 7646 states and 11364 transitions. [2021-11-12 23:30:20,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:30:20,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 91 [2021-11-12 23:30:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:20,771 INFO L225 Difference]: With dead ends: 7646 [2021-11-12 23:30:20,771 INFO L226 Difference]: Without dead ends: 3841 [2021-11-12 23:30:20,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:30:20,785 INFO L933 BasicCegarLoop]: 5012 mSDtfsCounter, 3040 mSDsluCounter, 2577 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2249.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3040 SdHoareTripleChecker+Valid, 7589 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.40ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2303.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:20,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3040 Valid, 7589 Invalid, 9 Unknown, 0 Unchecked, 9.40ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2303.49ms Time] [2021-11-12 23:30:20,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2021-11-12 23:30:20,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3838. [2021-11-12 23:30:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3069 states have (on average 1.4617139133268167) internal successors, (4486), 3091 states have internal predecessors, (4486), 606 states have call successors, (606), 164 states have call predecessors, (606), 162 states have return successors, (600), 600 states have call predecessors, (600), 597 states have call successors, (600) [2021-11-12 23:30:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 5692 transitions. [2021-11-12 23:30:20,999 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 5692 transitions. Word has length 91 [2021-11-12 23:30:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:21,000 INFO L470 AbstractCegarLoop]: Abstraction has 3838 states and 5692 transitions. [2021-11-12 23:30:21,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 5692 transitions. [2021-11-12 23:30:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 23:30:21,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:21,012 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-12 23:30:21,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:21,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:21,235 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:21,235 INFO L85 PathProgramCache]: Analyzing trace with hash -790775421, now seen corresponding path program 1 times [2021-11-12 23:30:21,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:21,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024953139] [2021-11-12 23:30:21,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:21,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:21,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:21,239 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:21,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:30:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:24,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:30:24,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:30:25,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:30:26,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:26,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024953139] [2021-11-12 23:30:26,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024953139] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:26,329 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:26,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:30:26,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113242750] [2021-11-12 23:30:26,329 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:26,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:30:26,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:26,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:30:26,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:30:26,331 INFO L87 Difference]: Start difference. First operand 3838 states and 5692 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-12 23:30:28,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:28,123 INFO L93 Difference]: Finished difference Result 9273 states and 13960 transitions. [2021-11-12 23:30:28,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:30:28,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 93 [2021-11-12 23:30:28,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:28,151 INFO L225 Difference]: With dead ends: 9273 [2021-11-12 23:30:28,151 INFO L226 Difference]: Without dead ends: 5468 [2021-11-12 23:30:28,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:30:28,166 INFO L933 BasicCegarLoop]: 3345 mSDtfsCounter, 2570 mSDsluCounter, 3669 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1434.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2838 SdHoareTripleChecker+Valid, 7014 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.72ms SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1559.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:28,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2838 Valid, 7014 Invalid, 309 Unknown, 0 Unchecked, 11.72ms Time], IncrementalHoareTripleChecker [149 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 1559.75ms Time] [2021-11-12 23:30:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5468 states. [2021-11-12 23:30:28,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5468 to 5422. [2021-11-12 23:30:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5422 states, 4371 states have (on average 1.4770075497597803) internal successors, (6456), 4403 states have internal predecessors, (6456), 888 states have call successors, (888), 164 states have call predecessors, (888), 162 states have return successors, (884), 884 states have call predecessors, (884), 879 states have call successors, (884) [2021-11-12 23:30:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5422 states to 5422 states and 8228 transitions. [2021-11-12 23:30:28,567 INFO L78 Accepts]: Start accepts. Automaton has 5422 states and 8228 transitions. Word has length 93 [2021-11-12 23:30:28,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:28,568 INFO L470 AbstractCegarLoop]: Abstraction has 5422 states and 8228 transitions. [2021-11-12 23:30:28,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-12 23:30:28,569 INFO L276 IsEmpty]: Start isEmpty. Operand 5422 states and 8228 transitions. [2021-11-12 23:30:28,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 23:30:28,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:28,573 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:30:28,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:28,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:28,787 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:28,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:28,787 INFO L85 PathProgramCache]: Analyzing trace with hash 849555907, now seen corresponding path program 1 times [2021-11-12 23:30:28,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:28,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252050199] [2021-11-12 23:30:28,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:28,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:28,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:28,791 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:28,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:30:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:32,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 1667 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:30:32,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:30:32,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:30:33,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:33,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252050199] [2021-11-12 23:30:33,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252050199] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:33,381 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:33,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-12 23:30:33,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663463169] [2021-11-12 23:30:33,382 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:33,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:30:33,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:33,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:30:33,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:30:33,383 INFO L87 Difference]: Start difference. First operand 5422 states and 8228 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:30:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:34,476 INFO L93 Difference]: Finished difference Result 9401 states and 14342 transitions. [2021-11-12 23:30:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:30:34,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2021-11-12 23:30:34,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:34,515 INFO L225 Difference]: With dead ends: 9401 [2021-11-12 23:30:34,515 INFO L226 Difference]: Without dead ends: 7690 [2021-11-12 23:30:34,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:30:34,524 INFO L933 BasicCegarLoop]: 4246 mSDtfsCounter, 2510 mSDsluCounter, 14087 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 570.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2511 SdHoareTripleChecker+Valid, 18333 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.33ms SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 681.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:34,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2511 Valid, 18333 Invalid, 398 Unknown, 0 Unchecked, 18.33ms Time], IncrementalHoareTripleChecker [376 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 681.69ms Time] [2021-11-12 23:30:34,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7690 states. [2021-11-12 23:30:34,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7690 to 5419. [2021-11-12 23:30:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 4368 states have (on average 1.4766483516483517) internal successors, (6450), 4400 states have internal predecessors, (6450), 888 states have call successors, (888), 164 states have call predecessors, (888), 162 states have return successors, (884), 884 states have call predecessors, (884), 879 states have call successors, (884) [2021-11-12 23:30:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 8222 transitions. [2021-11-12 23:30:34,930 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 8222 transitions. Word has length 108 [2021-11-12 23:30:34,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:34,930 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 8222 transitions. [2021-11-12 23:30:34,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:30:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 8222 transitions. [2021-11-12 23:30:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:30:34,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:34,935 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-12 23:30:34,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:35,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:35,159 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:35,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:35,159 INFO L85 PathProgramCache]: Analyzing trace with hash -389306663, now seen corresponding path program 1 times [2021-11-12 23:30:35,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:35,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783527221] [2021-11-12 23:30:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:35,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:35,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:35,162 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:35,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:30:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:38,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:30:38,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:30:39,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:30:40,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:40,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783527221] [2021-11-12 23:30:40,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783527221] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:40,388 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:40,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:30:40,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716206612] [2021-11-12 23:30:40,388 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:40,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:30:40,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:40,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:30:40,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:30:40,389 INFO L87 Difference]: Start difference. First operand 5419 states and 8222 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 4 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-12 23:30:42,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:42,415 INFO L93 Difference]: Finished difference Result 15881 states and 24668 transitions. [2021-11-12 23:30:42,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:30:42,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 4 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 112 [2021-11-12 23:30:42,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:42,456 INFO L225 Difference]: With dead ends: 15881 [2021-11-12 23:30:42,456 INFO L226 Difference]: Without dead ends: 10495 [2021-11-12 23:30:42,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:30:42,477 INFO L933 BasicCegarLoop]: 4408 mSDtfsCounter, 3235 mSDsluCounter, 4242 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1454.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3571 SdHoareTripleChecker+Valid, 8650 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.24ms SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1578.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:42,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3571 Valid, 8650 Invalid, 358 Unknown, 0 Unchecked, 12.24ms Time], IncrementalHoareTripleChecker [187 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 1578.45ms Time] [2021-11-12 23:30:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-11-12 23:30:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 9851. [2021-11-12 23:30:43,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9851 states, 8092 states have (on average 1.5101334651507663) internal successors, (12220), 8120 states have internal predecessors, (12220), 1596 states have call successors, (1596), 164 states have call predecessors, (1596), 162 states have return successors, (1602), 1602 states have call predecessors, (1602), 1587 states have call successors, (1602) [2021-11-12 23:30:43,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9851 states to 9851 states and 15418 transitions. [2021-11-12 23:30:43,110 INFO L78 Accepts]: Start accepts. Automaton has 9851 states and 15418 transitions. Word has length 112 [2021-11-12 23:30:43,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:43,111 INFO L470 AbstractCegarLoop]: Abstraction has 9851 states and 15418 transitions. [2021-11-12 23:30:43,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 4 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-12 23:30:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand 9851 states and 15418 transitions. [2021-11-12 23:30:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 23:30:43,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:43,117 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-12 23:30:43,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:43,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:43,331 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:43,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:43,331 INFO L85 PathProgramCache]: Analyzing trace with hash -478466939, now seen corresponding path program 1 times [2021-11-12 23:30:43,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:43,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001642121] [2021-11-12 23:30:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:43,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:43,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:43,336 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:43,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:30:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:47,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:30:47,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:30:47,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:30:48,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:48,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001642121] [2021-11-12 23:30:48,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001642121] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:48,264 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:48,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:30:48,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945243194] [2021-11-12 23:30:48,265 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:48,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:30:48,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:48,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:30:48,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:30:48,266 INFO L87 Difference]: Start difference. First operand 9851 states and 15418 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:30:50,464 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:50,836 INFO L93 Difference]: Finished difference Result 9853 states and 15419 transitions. [2021-11-12 23:30:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:30:50,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 111 [2021-11-12 23:30:50,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:50,871 INFO L225 Difference]: With dead ends: 9853 [2021-11-12 23:30:50,872 INFO L226 Difference]: Without dead ends: 9850 [2021-11-12 23:30:50,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:30:50,879 INFO L933 BasicCegarLoop]: 3170 mSDtfsCounter, 145 mSDsluCounter, 2988 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2218.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 6158 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2273.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:50,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 6158 Invalid, 5 Unknown, 0 Unchecked, 4.72ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2273.33ms Time] [2021-11-12 23:30:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9850 states. [2021-11-12 23:30:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9850 to 9850. [2021-11-12 23:30:51,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9850 states, 8092 states have (on average 1.5098863074641622) internal successors, (12218), 8119 states have internal predecessors, (12218), 1595 states have call successors, (1595), 164 states have call predecessors, (1595), 162 states have return successors, (1602), 1602 states have call predecessors, (1602), 1587 states have call successors, (1602) [2021-11-12 23:30:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9850 states to 9850 states and 15415 transitions. [2021-11-12 23:30:51,483 INFO L78 Accepts]: Start accepts. Automaton has 9850 states and 15415 transitions. Word has length 111 [2021-11-12 23:30:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:51,484 INFO L470 AbstractCegarLoop]: Abstraction has 9850 states and 15415 transitions. [2021-11-12 23:30:51,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:30:51,485 INFO L276 IsEmpty]: Start isEmpty. Operand 9850 states and 15415 transitions. [2021-11-12 23:30:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-12 23:30:51,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:51,510 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-11-12 23:30:51,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:51,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:51,735 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:51,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:51,735 INFO L85 PathProgramCache]: Analyzing trace with hash 328878096, now seen corresponding path program 1 times [2021-11-12 23:30:51,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:51,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287883551] [2021-11-12 23:30:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:51,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:51,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:51,739 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:51,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:30:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:55,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:30:55,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:30:56,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:30:56,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:56,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287883551] [2021-11-12 23:30:56,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287883551] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:56,796 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:56,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:30:56,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390137259] [2021-11-12 23:30:56,797 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:56,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:30:56,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:56,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:30:56,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:30:56,798 INFO L87 Difference]: Start difference. First operand 9850 states and 15415 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 4 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:30:57,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:57,779 INFO L93 Difference]: Finished difference Result 19751 states and 30918 transitions. [2021-11-12 23:30:57,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:57,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 4 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 174 [2021-11-12 23:30:57,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:57,814 INFO L225 Difference]: With dead ends: 19751 [2021-11-12 23:30:57,815 INFO L226 Difference]: Without dead ends: 9907 [2021-11-12 23:30:57,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:30:57,840 INFO L933 BasicCegarLoop]: 3189 mSDtfsCounter, 50 mSDsluCounter, 9489 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 385.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 12678 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.00ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 403.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:57,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 12678 Invalid, 87 Unknown, 0 Unchecked, 11.00ms Time], IncrementalHoareTripleChecker [45 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 403.73ms Time] [2021-11-12 23:30:57,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9907 states. [2021-11-12 23:30:58,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9907 to 9838. [2021-11-12 23:30:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9838 states, 8089 states have (on average 1.5093336629991345) internal successors, (12209), 8116 states have internal predecessors, (12209), 1586 states have call successors, (1586), 164 states have call predecessors, (1586), 162 states have return successors, (1593), 1593 states have call predecessors, (1593), 1578 states have call successors, (1593) [2021-11-12 23:30:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9838 states to 9838 states and 15388 transitions. [2021-11-12 23:30:58,418 INFO L78 Accepts]: Start accepts. Automaton has 9838 states and 15388 transitions. Word has length 174 [2021-11-12 23:30:58,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:58,418 INFO L470 AbstractCegarLoop]: Abstraction has 9838 states and 15388 transitions. [2021-11-12 23:30:58,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 4 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:30:58,419 INFO L276 IsEmpty]: Start isEmpty. Operand 9838 states and 15388 transitions. [2021-11-12 23:30:58,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-12 23:30:58,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:58,519 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:30:58,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:58,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:58,729 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:58,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:58,730 INFO L85 PathProgramCache]: Analyzing trace with hash 841504615, now seen corresponding path program 1 times [2021-11-12 23:30:58,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:58,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373980553] [2021-11-12 23:30:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:58,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:58,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:58,733 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:58,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:31:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:02,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 2105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:31:02,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 23:31:04,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-12 23:31:05,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:05,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373980553] [2021-11-12 23:31:05,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373980553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:05,651 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:05,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:31:05,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8488596] [2021-11-12 23:31:05,652 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:05,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:31:05,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:05,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:31:05,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:31:05,654 INFO L87 Difference]: Start difference. First operand 9838 states and 15388 transitions. Second operand has 6 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 4 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (73), 4 states have call predecessors, (73), 4 states have call successors, (73) [2021-11-12 23:31:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:06,306 INFO L93 Difference]: Finished difference Result 19705 states and 30825 transitions. [2021-11-12 23:31:06,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:31:06,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 4 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (73), 4 states have call predecessors, (73), 4 states have call successors, (73) Word has length 289 [2021-11-12 23:31:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:06,332 INFO L225 Difference]: With dead ends: 19705 [2021-11-12 23:31:06,332 INFO L226 Difference]: Without dead ends: 9846 [2021-11-12 23:31:06,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:31:06,356 INFO L933 BasicCegarLoop]: 3179 mSDtfsCounter, 34 mSDsluCounter, 9494 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 180.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 12673 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.22ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 192.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:06,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 12673 Invalid, 50 Unknown, 0 Unchecked, 8.22ms Time], IncrementalHoareTripleChecker [28 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 192.88ms Time] [2021-11-12 23:31:06,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9846 states. [2021-11-12 23:31:06,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9846 to 9780. [2021-11-12 23:31:06,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9780 states, 8066 states have (on average 1.5078105628564344) internal successors, (12162), 8078 states have internal predecessors, (12162), 1552 states have call successors, (1552), 163 states have call predecessors, (1552), 161 states have return successors, (1559), 1559 states have call predecessors, (1559), 1544 states have call successors, (1559) [2021-11-12 23:31:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9780 states to 9780 states and 15273 transitions. [2021-11-12 23:31:07,009 INFO L78 Accepts]: Start accepts. Automaton has 9780 states and 15273 transitions. Word has length 289 [2021-11-12 23:31:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:07,010 INFO L470 AbstractCegarLoop]: Abstraction has 9780 states and 15273 transitions. [2021-11-12 23:31:07,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 4 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (73), 4 states have call predecessors, (73), 4 states have call successors, (73) [2021-11-12 23:31:07,011 INFO L276 IsEmpty]: Start isEmpty. Operand 9780 states and 15273 transitions. [2021-11-12 23:31:07,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-12 23:31:07,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:07,037 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:07,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:07,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:07,259 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:07,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:07,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2051310902, now seen corresponding path program 1 times [2021-11-12 23:31:07,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:07,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497653919] [2021-11-12 23:31:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:07,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:07,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:07,265 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:07,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:31:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:11,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:31:11,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:31:13,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-12 23:31:15,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:15,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497653919] [2021-11-12 23:31:15,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497653919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:15,718 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:15,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 16 [2021-11-12 23:31:15,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883617752] [2021-11-12 23:31:15,719 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:15,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:31:15,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:15,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:31:15,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:31:15,721 INFO L87 Difference]: Start difference. First operand 9780 states and 15273 transitions. Second operand has 16 states, 16 states have (on average 14.0) internal successors, (224), 14 states have internal predecessors, (224), 4 states have call successors, (65), 2 states have call predecessors, (65), 4 states have return successors, (64), 6 states have call predecessors, (64), 4 states have call successors, (64) [2021-11-12 23:31:20,295 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:22,305 WARN L515 Checker$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 23:31:23,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:23,460 INFO L93 Difference]: Finished difference Result 19761 states and 30867 transitions. [2021-11-12 23:31:23,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:31:23,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 14.0) internal successors, (224), 14 states have internal predecessors, (224), 4 states have call successors, (65), 2 states have call predecessors, (65), 4 states have return successors, (64), 6 states have call predecessors, (64), 4 states have call successors, (64) Word has length 269 [2021-11-12 23:31:23,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:23,498 INFO L225 Difference]: With dead ends: 19761 [2021-11-12 23:31:23,499 INFO L226 Difference]: Without dead ends: 9931 [2021-11-12 23:31:23,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:31:23,525 INFO L933 BasicCegarLoop]: 3205 mSDtfsCounter, 216 mSDsluCounter, 35029 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 169 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5513.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 38234 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 98.81ms SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5663.70ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:23,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 38234 Invalid, 332 Unknown, 0 Unchecked, 98.81ms Time], IncrementalHoareTripleChecker [169 Valid, 161 Invalid, 2 Unknown, 0 Unchecked, 5663.70ms Time] [2021-11-12 23:31:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9931 states. [2021-11-12 23:31:24,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9931 to 9783. [2021-11-12 23:31:24,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9783 states, 8070 states have (on average 1.5063197026022306) internal successors, (12156), 8082 states have internal predecessors, (12156), 1550 states have call successors, (1550), 163 states have call predecessors, (1550), 162 states have return successors, (1560), 1558 states have call predecessors, (1560), 1542 states have call successors, (1560) [2021-11-12 23:31:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9783 states to 9783 states and 15266 transitions. [2021-11-12 23:31:24,143 INFO L78 Accepts]: Start accepts. Automaton has 9783 states and 15266 transitions. Word has length 269 [2021-11-12 23:31:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:24,143 INFO L470 AbstractCegarLoop]: Abstraction has 9783 states and 15266 transitions. [2021-11-12 23:31:24,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.0) internal successors, (224), 14 states have internal predecessors, (224), 4 states have call successors, (65), 2 states have call predecessors, (65), 4 states have return successors, (64), 6 states have call predecessors, (64), 4 states have call successors, (64) [2021-11-12 23:31:24,144 INFO L276 IsEmpty]: Start isEmpty. Operand 9783 states and 15266 transitions. [2021-11-12 23:31:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-11-12 23:31:24,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:24,168 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:24,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:24,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:24,383 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:24,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:24,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1149954087, now seen corresponding path program 1 times [2021-11-12 23:31:24,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:24,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573738348] [2021-11-12 23:31:24,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:24,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:24,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:24,386 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:24,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:31:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:28,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 2214 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:31:28,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 23:31:29,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 23:31:30,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:30,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573738348] [2021-11-12 23:31:30,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573738348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:30,890 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:30,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:31:30,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590031561] [2021-11-12 23:31:30,890 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:30,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:31:30,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:30,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:31:30,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:31:30,892 INFO L87 Difference]: Start difference. First operand 9783 states and 15266 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 2 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2021-11-12 23:31:31,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:31,469 INFO L93 Difference]: Finished difference Result 19539 states and 30500 transitions. [2021-11-12 23:31:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:31:31,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 2 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) Word has length 297 [2021-11-12 23:31:31,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:31,492 INFO L225 Difference]: With dead ends: 19539 [2021-11-12 23:31:31,492 INFO L226 Difference]: Without dead ends: 9789 [2021-11-12 23:31:31,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:31:31,508 INFO L933 BasicCegarLoop]: 3144 mSDtfsCounter, 0 mSDsluCounter, 3137 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6281 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.68ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:31,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6281 Invalid, 14 Unknown, 0 Unchecked, 6.68ms Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 71.94ms Time] [2021-11-12 23:31:31,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9789 states. [2021-11-12 23:31:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9789 to 9783. [2021-11-12 23:31:31,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9783 states, 8070 states have (on average 1.504089219330855) internal successors, (12138), 8082 states have internal predecessors, (12138), 1550 states have call successors, (1550), 163 states have call predecessors, (1550), 162 states have return successors, (1560), 1558 states have call predecessors, (1560), 1542 states have call successors, (1560) [2021-11-12 23:31:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9783 states to 9783 states and 15248 transitions. [2021-11-12 23:31:31,996 INFO L78 Accepts]: Start accepts. Automaton has 9783 states and 15248 transitions. Word has length 297 [2021-11-12 23:31:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:31,997 INFO L470 AbstractCegarLoop]: Abstraction has 9783 states and 15248 transitions. [2021-11-12 23:31:31,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 2 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2021-11-12 23:31:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 9783 states and 15248 transitions. [2021-11-12 23:31:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-12 23:31:32,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:32,016 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:32,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:32,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:32,239 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:32,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:32,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1932997356, now seen corresponding path program 1 times [2021-11-12 23:31:32,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:32,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486880563] [2021-11-12 23:31:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:32,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:32,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:32,242 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:32,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:31:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:36,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 2218 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:31:36,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:31:37,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 23:31:38,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:38,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486880563] [2021-11-12 23:31:38,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486880563] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:38,155 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:38,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:31:38,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756285135] [2021-11-12 23:31:38,156 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:38,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:31:38,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:38,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:31:38,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:31:38,158 INFO L87 Difference]: Start difference. First operand 9783 states and 15248 transitions. Second operand has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-12 23:31:38,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:38,613 INFO L93 Difference]: Finished difference Result 19551 states and 30488 transitions. [2021-11-12 23:31:38,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:31:38,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 299 [2021-11-12 23:31:38,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:38,646 INFO L225 Difference]: With dead ends: 19551 [2021-11-12 23:31:38,646 INFO L226 Difference]: Without dead ends: 9801 [2021-11-12 23:31:38,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 594 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:31:38,667 INFO L933 BasicCegarLoop]: 3144 mSDtfsCounter, 3 mSDsluCounter, 3141 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6285 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.59ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:38,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6285 Invalid, 9 Unknown, 0 Unchecked, 4.59ms Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 127.11ms Time] [2021-11-12 23:31:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9801 states. [2021-11-12 23:31:39,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9801 to 9801. [2021-11-12 23:31:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9801 states, 8088 states have (on average 1.502967359050445) internal successors, (12156), 8100 states have internal predecessors, (12156), 1550 states have call successors, (1550), 163 states have call predecessors, (1550), 162 states have return successors, (1560), 1558 states have call predecessors, (1560), 1542 states have call successors, (1560) [2021-11-12 23:31:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9801 states to 9801 states and 15266 transitions. [2021-11-12 23:31:39,154 INFO L78 Accepts]: Start accepts. Automaton has 9801 states and 15266 transitions. Word has length 299 [2021-11-12 23:31:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:39,154 INFO L470 AbstractCegarLoop]: Abstraction has 9801 states and 15266 transitions. [2021-11-12 23:31:39,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-12 23:31:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 9801 states and 15266 transitions. [2021-11-12 23:31:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-12 23:31:39,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:39,166 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:39,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:39,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:39,371 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:39,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:39,371 INFO L85 PathProgramCache]: Analyzing trace with hash 85756321, now seen corresponding path program 1 times [2021-11-12 23:31:39,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:39,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422545765] [2021-11-12 23:31:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:39,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:39,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:39,375 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:39,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:31:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:43,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 2097 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:31:43,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:31:44,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 23:31:45,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:45,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422545765] [2021-11-12 23:31:45,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422545765] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:45,317 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:45,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:31:45,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835841962] [2021-11-12 23:31:45,318 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:45,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:31:45,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:31:45,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:31:45,320 INFO L87 Difference]: Start difference. First operand 9801 states and 15266 transitions. Second operand has 8 states, 8 states have (on average 23.25) internal successors, (186), 8 states have internal predecessors, (186), 6 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (50), 6 states have call predecessors, (50), 6 states have call successors, (50) [2021-11-12 23:31:46,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:46,959 INFO L93 Difference]: Finished difference Result 19735 states and 30746 transitions. [2021-11-12 23:31:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:31:46,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.25) internal successors, (186), 8 states have internal predecessors, (186), 6 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (50), 6 states have call predecessors, (50), 6 states have call successors, (50) Word has length 289 [2021-11-12 23:31:46,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:46,985 INFO L225 Difference]: With dead ends: 19735 [2021-11-12 23:31:46,985 INFO L226 Difference]: Without dead ends: 9880 [2021-11-12 23:31:47,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:31:47,004 INFO L933 BasicCegarLoop]: 3218 mSDtfsCounter, 233 mSDsluCounter, 9431 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 682.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 12649 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.45ms SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 725.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:47,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 12649 Invalid, 244 Unknown, 0 Unchecked, 9.45ms Time], IncrementalHoareTripleChecker [155 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 725.10ms Time] [2021-11-12 23:31:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9880 states. [2021-11-12 23:31:47,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9880 to 9741. [2021-11-12 23:31:47,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9741 states, 8053 states have (on average 1.502048925866137) internal successors, (12096), 8065 states have internal predecessors, (12096), 1525 states have call successors, (1525), 163 states have call predecessors, (1525), 162 states have return successors, (1535), 1533 states have call predecessors, (1535), 1517 states have call successors, (1535) [2021-11-12 23:31:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9741 states to 9741 states and 15156 transitions. [2021-11-12 23:31:47,536 INFO L78 Accepts]: Start accepts. Automaton has 9741 states and 15156 transitions. Word has length 289 [2021-11-12 23:31:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:47,537 INFO L470 AbstractCegarLoop]: Abstraction has 9741 states and 15156 transitions. [2021-11-12 23:31:47,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.25) internal successors, (186), 8 states have internal predecessors, (186), 6 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (50), 6 states have call predecessors, (50), 6 states have call successors, (50) [2021-11-12 23:31:47,538 INFO L276 IsEmpty]: Start isEmpty. Operand 9741 states and 15156 transitions. [2021-11-12 23:31:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-12 23:31:47,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:47,551 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:47,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:47,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:47,775 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:47,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:47,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1703576628, now seen corresponding path program 1 times [2021-11-12 23:31:47,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:47,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582876845] [2021-11-12 23:31:47,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:47,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:47,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:47,778 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:47,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:31:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:52,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:31:52,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:31:53,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 23:31:54,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:54,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582876845] [2021-11-12 23:31:54,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582876845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:54,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1596284856] [2021-11-12 23:31:54,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:54,310 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:54,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:54,311 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:54,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 23:31:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:55,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:31:55,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-12 23:31:57,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-12 23:31:59,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1596284856] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:59,376 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:31:59,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [5, 5] total 14 [2021-11-12 23:31:59,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525368140] [2021-11-12 23:31:59,377 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:59,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:31:59,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:59,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:31:59,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:31:59,379 INFO L87 Difference]: Start difference. First operand 9741 states and 15156 transitions. Second operand has 8 states, 8 states have (on average 27.875) internal successors, (223), 7 states have internal predecessors, (223), 4 states have call successors, (48), 2 states have call predecessors, (48), 5 states have return successors, (48), 5 states have call predecessors, (48), 4 states have call successors, (48) [2021-11-12 23:32:00,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:00,733 INFO L93 Difference]: Finished difference Result 19557 states and 30862 transitions. [2021-11-12 23:32:00,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:32:00,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.875) internal successors, (223), 7 states have internal predecessors, (223), 4 states have call successors, (48), 2 states have call predecessors, (48), 5 states have return successors, (48), 5 states have call predecessors, (48), 4 states have call successors, (48) Word has length 303 [2021-11-12 23:32:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:00,773 INFO L225 Difference]: With dead ends: 19557 [2021-11-12 23:32:00,773 INFO L226 Difference]: Without dead ends: 9849 [2021-11-12 23:32:00,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1208 GetRequests, 1196 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:32:00,802 INFO L933 BasicCegarLoop]: 3158 mSDtfsCounter, 107 mSDsluCounter, 15673 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 706.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 18831 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.16ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 754.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:00,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 18831 Invalid, 122 Unknown, 0 Unchecked, 19.16ms Time], IncrementalHoareTripleChecker [29 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 754.25ms Time] [2021-11-12 23:32:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9849 states. [2021-11-12 23:32:01,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9849 to 9839. [2021-11-12 23:32:01,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9839 states, 8129 states have (on average 1.5005535736252922) internal successors, (12198), 8143 states have internal predecessors, (12198), 1545 states have call successors, (1545), 163 states have call predecessors, (1545), 164 states have return successors, (1559), 1553 states have call predecessors, (1559), 1537 states have call successors, (1559) [2021-11-12 23:32:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9839 states to 9839 states and 15302 transitions. [2021-11-12 23:32:01,361 INFO L78 Accepts]: Start accepts. Automaton has 9839 states and 15302 transitions. Word has length 303 [2021-11-12 23:32:01,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:01,362 INFO L470 AbstractCegarLoop]: Abstraction has 9839 states and 15302 transitions. [2021-11-12 23:32:01,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.875) internal successors, (223), 7 states have internal predecessors, (223), 4 states have call successors, (48), 2 states have call predecessors, (48), 5 states have return successors, (48), 5 states have call predecessors, (48), 4 states have call successors, (48) [2021-11-12 23:32:01,363 INFO L276 IsEmpty]: Start isEmpty. Operand 9839 states and 15302 transitions. [2021-11-12 23:32:01,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-12 23:32:01,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:01,379 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:01,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:01,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:01,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:01,794 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:01,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:01,795 INFO L85 PathProgramCache]: Analyzing trace with hash 820067638, now seen corresponding path program 1 times [2021-11-12 23:32:01,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:01,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936054771] [2021-11-12 23:32:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:01,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:01,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:01,799 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:01,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:32:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:05,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 2227 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:32:05,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:32:07,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 23:32:08,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:08,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936054771] [2021-11-12 23:32:08,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936054771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:08,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1054423979] [2021-11-12 23:32:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:08,103 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:08,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:32:08,103 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:32:08,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 23:32:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:09,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 2227 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:32:09,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-12 23:32:10,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-12 23:32:12,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1054423979] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:12,198 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:32:12,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-12 23:32:12,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028820366] [2021-11-12 23:32:12,198 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:12,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:32:12,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:12,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:32:12,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:32:12,200 INFO L87 Difference]: Start difference. First operand 9839 states and 15302 transitions. Second operand has 10 states, 10 states have (on average 20.0) internal successors, (200), 8 states have internal predecessors, (200), 2 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (42), 4 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-12 23:32:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:14,847 INFO L93 Difference]: Finished difference Result 19257 states and 30222 transitions. [2021-11-12 23:32:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:32:14,848 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.0) internal successors, (200), 8 states have internal predecessors, (200), 2 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (42), 4 states have call predecessors, (42), 2 states have call successors, (42) Word has length 303 [2021-11-12 23:32:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:14,902 INFO L225 Difference]: With dead ends: 19257 [2021-11-12 23:32:14,902 INFO L226 Difference]: Without dead ends: 18357 [2021-11-12 23:32:14,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1210 GetRequests, 1195 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:32:14,916 INFO L933 BasicCegarLoop]: 5053 mSDtfsCounter, 2485 mSDsluCounter, 29934 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1469.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2592 SdHoareTripleChecker+Valid, 34987 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.50ms SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1629.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:14,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2592 Valid, 34987 Invalid, 490 Unknown, 0 Unchecked, 42.50ms Time], IncrementalHoareTripleChecker [343 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1629.52ms Time] [2021-11-12 23:32:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18357 states. [2021-11-12 23:32:15,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18357 to 9691. [2021-11-12 23:32:15,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9691 states, 8002 states have (on average 1.498625343664084) internal successors, (11992), 8015 states have internal predecessors, (11992), 1525 states have call successors, (1525), 162 states have call predecessors, (1525), 163 states have return successors, (1540), 1534 states have call predecessors, (1540), 1518 states have call successors, (1540) [2021-11-12 23:32:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9691 states to 9691 states and 15057 transitions. [2021-11-12 23:32:15,547 INFO L78 Accepts]: Start accepts. Automaton has 9691 states and 15057 transitions. Word has length 303 [2021-11-12 23:32:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:15,548 INFO L470 AbstractCegarLoop]: Abstraction has 9691 states and 15057 transitions. [2021-11-12 23:32:15,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.0) internal successors, (200), 8 states have internal predecessors, (200), 2 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (42), 4 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-12 23:32:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 9691 states and 15057 transitions. [2021-11-12 23:32:15,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-12 23:32:15,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:15,562 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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, 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 23:32:15,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:15,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:15,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:15,975 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:15,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:15,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1490675135, now seen corresponding path program 1 times [2021-11-12 23:32:15,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:15,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253970497] [2021-11-12 23:32:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:15,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:15,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:15,978 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:15,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:32:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:20,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 2256 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:32:20,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:21,458 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-12 23:32:21,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 23:32:22,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:22,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253970497] [2021-11-12 23:32:22,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253970497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:22,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1747455811] [2021-11-12 23:32:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:22,566 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:22,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:32:22,567 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:32:22,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-12 23:32:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:24,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 2256 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:32:24,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-12 23:32:25,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 23:32:26,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1747455811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:26,113 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:32:26,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-12 23:32:26,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533747742] [2021-11-12 23:32:26,114 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:26,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:32:26,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:26,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:32:26,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:32:26,115 INFO L87 Difference]: Start difference. First operand 9691 states and 15057 transitions. Second operand has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 5 states have internal predecessors, (194), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-12 23:32:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:27,675 INFO L93 Difference]: Finished difference Result 19278 states and 30151 transitions. [2021-11-12 23:32:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:32:27,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 5 states have internal predecessors, (194), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) Word has length 309 [2021-11-12 23:32:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:27,729 INFO L225 Difference]: With dead ends: 19278 [2021-11-12 23:32:27,729 INFO L226 Difference]: Without dead ends: 16657 [2021-11-12 23:32:27,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1234 GetRequests, 1223 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:32:27,747 INFO L933 BasicCegarLoop]: 4540 mSDtfsCounter, 2503 mSDsluCounter, 15263 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 522.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2503 SdHoareTripleChecker+Valid, 19803 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.96ms SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 626.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:27,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2503 Valid, 19803 Invalid, 400 Unknown, 0 Unchecked, 23.96ms Time], IncrementalHoareTripleChecker [378 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 626.71ms Time] [2021-11-12 23:32:27,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16657 states. [2021-11-12 23:32:28,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16657 to 9682. [2021-11-12 23:32:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9682 states, 7996 states have (on average 1.498249124562281) internal successors, (11980), 8009 states have internal predecessors, (11980), 1522 states have call successors, (1522), 162 states have call predecessors, (1522), 163 states have return successors, (1537), 1531 states have call predecessors, (1537), 1515 states have call successors, (1537) [2021-11-12 23:32:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9682 states to 9682 states and 15039 transitions. [2021-11-12 23:32:28,372 INFO L78 Accepts]: Start accepts. Automaton has 9682 states and 15039 transitions. Word has length 309 [2021-11-12 23:32:28,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:28,373 INFO L470 AbstractCegarLoop]: Abstraction has 9682 states and 15039 transitions. [2021-11-12 23:32:28,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 5 states have internal predecessors, (194), 2 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-12 23:32:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand 9682 states and 15039 transitions. [2021-11-12 23:32:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-12 23:32:28,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:28,392 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:28,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:28,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:28,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:28,815 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:28,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:28,815 INFO L85 PathProgramCache]: Analyzing trace with hash 35889146, now seen corresponding path program 1 times [2021-11-12 23:32:28,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:28,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473688366] [2021-11-12 23:32:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:28,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:28,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:28,819 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:28,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:32:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:32,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 2257 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:32:33,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:32:34,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 23:32:35,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:35,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473688366] [2021-11-12 23:32:35,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473688366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:35,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [537944498] [2021-11-12 23:32:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:35,345 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:35,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:32:35,346 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:32:35,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 23:32:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:37,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 2257 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:32:37,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-12 23:32:38,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-12 23:32:39,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [537944498] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:39,462 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:32:39,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-12 23:32:39,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312656697] [2021-11-12 23:32:39,463 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:39,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:32:39,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:39,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:32:39,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:32:39,465 INFO L87 Difference]: Start difference. First operand 9682 states and 15039 transitions. Second operand has 10 states, 10 states have (on average 20.6) internal successors, (206), 8 states have internal predecessors, (206), 2 states have call successors, (46), 2 states have call predecessors, (46), 4 states have return successors, (45), 4 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-12 23:32:42,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:42,018 INFO L93 Difference]: Finished difference Result 15437 states and 24216 transitions. [2021-11-12 23:32:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:32:42,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.6) internal successors, (206), 8 states have internal predecessors, (206), 2 states have call successors, (46), 2 states have call predecessors, (46), 4 states have return successors, (45), 4 states have call predecessors, (45), 2 states have call successors, (45) Word has length 312 [2021-11-12 23:32:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:42,057 INFO L225 Difference]: With dead ends: 15437 [2021-11-12 23:32:42,057 INFO L226 Difference]: Without dead ends: 14425 [2021-11-12 23:32:42,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1246 GetRequests, 1231 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:32:42,066 INFO L933 BasicCegarLoop]: 4935 mSDtfsCounter, 3048 mSDsluCounter, 30990 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1473.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3155 SdHoareTripleChecker+Valid, 35925 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.44ms SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1620.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:42,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3155 Valid, 35925 Invalid, 590 Unknown, 0 Unchecked, 33.44ms Time], IncrementalHoareTripleChecker [448 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 1620.55ms Time] [2021-11-12 23:32:42,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14425 states. [2021-11-12 23:32:42,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14425 to 9304. [2021-11-12 23:32:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9304 states, 7692 states have (on average 1.498569942797712) internal successors, (11527), 7702 states have internal predecessors, (11527), 1459 states have call successors, (1459), 151 states have call predecessors, (1459), 152 states have return successors, (1475), 1470 states have call predecessors, (1475), 1454 states have call successors, (1475) [2021-11-12 23:32:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9304 states to 9304 states and 14461 transitions. [2021-11-12 23:32:42,727 INFO L78 Accepts]: Start accepts. Automaton has 9304 states and 14461 transitions. Word has length 312 [2021-11-12 23:32:42,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:42,727 INFO L470 AbstractCegarLoop]: Abstraction has 9304 states and 14461 transitions. [2021-11-12 23:32:42,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.6) internal successors, (206), 8 states have internal predecessors, (206), 2 states have call successors, (46), 2 states have call predecessors, (46), 4 states have return successors, (45), 4 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-12 23:32:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 9304 states and 14461 transitions. [2021-11-12 23:32:42,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-11-12 23:32:42,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:42,739 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:42,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:42,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:43,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:43,140 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:43,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1170871613, now seen corresponding path program 1 times [2021-11-12 23:32:43,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:43,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793947705] [2021-11-12 23:32:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:43,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:43,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:43,144 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:43,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:32:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:47,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 2269 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:32:47,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 35 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 23:32:48,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 23:32:49,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:49,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793947705] [2021-11-12 23:32:49,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793947705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:49,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1553485025] [2021-11-12 23:32:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:49,817 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:49,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:32:49,818 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:32:49,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 23:32:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:51,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 2269 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:32:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-12 23:32:52,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-12 23:32:53,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1553485025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:53,457 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:32:53,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-12 23:32:53,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820318626] [2021-11-12 23:32:53,458 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:53,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:32:53,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:32:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:32:53,460 INFO L87 Difference]: Start difference. First operand 9304 states and 14461 transitions. Second operand has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 5 states have internal predecessors, (196), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (44), 3 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-12 23:32:54,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:54,825 INFO L93 Difference]: Finished difference Result 15148 states and 23778 transitions. [2021-11-12 23:32:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:32:54,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 5 states have internal predecessors, (196), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (44), 3 states have call predecessors, (44), 2 states have call successors, (44) Word has length 315 [2021-11-12 23:32:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:54,828 INFO L225 Difference]: With dead ends: 15148 [2021-11-12 23:32:54,828 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 23:32:54,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1258 GetRequests, 1247 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:32:54,851 INFO L933 BasicCegarLoop]: 4342 mSDtfsCounter, 2412 mSDsluCounter, 14609 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 469.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2413 SdHoareTripleChecker+Valid, 18951 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.20ms SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 551.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:54,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2413 Valid, 18951 Invalid, 352 Unknown, 0 Unchecked, 20.20ms Time], IncrementalHoareTripleChecker [330 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 551.21ms Time] [2021-11-12 23:32:54,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 23:32:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 23:32:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:32:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 23:32:54,854 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 315 [2021-11-12 23:32:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:54,855 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 23:32:54,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 5 states have internal predecessors, (196), 2 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (44), 3 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-12 23:32:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 23:32:54,855 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 23:32:54,858 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:32:54,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:55,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:55,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d1be7d-aae8-48bb-94aa-8cd901f280b3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:55,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 23:40:45,570 WARN L227 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 188 DAG size of output: 22 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)