./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 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/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_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs --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-0f8a17c [2021-11-19 13:37:37,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:37:37,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:37:37,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:37:37,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:37:37,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:37:37,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:37:37,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:37:37,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:37:37,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:37:37,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:37:37,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:37:37,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:37:37,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:37:37,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:37:37,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:37:37,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:37:37,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:37:37,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:37:37,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:37:37,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:37:37,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:37:37,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:37:37,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:37:37,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:37:37,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:37:37,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:37:37,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:37:37,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:37:37,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:37:37,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:37:37,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:37:37,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:37:37,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:37:37,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:37:37,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:37:37,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:37:37,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:37:37,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:37:37,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:37:37,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:37:37,354 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 13:37:37,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:37:37,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:37:37,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:37:37,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:37:37,415 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:37:37,415 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:37:37,416 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:37:37,416 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:37:37,416 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:37:37,416 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:37:37,418 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:37:37,418 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:37:37,418 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:37:37,418 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:37:37,419 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:37:37,419 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:37:37,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:37:37,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:37:37,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:37:37,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:37:37,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:37:37,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:37:37,421 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:37:37,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:37:37,422 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:37:37,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:37:37,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:37:37,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:37:37,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:37,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:37:37,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:37:37,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:37:37,426 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:37:37,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:37:37,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:37:37,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:37:37,427 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:37:37,427 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_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2eef4809e0fb5b801f2479dfde07a6f5e1ac3784201f878d167f0654e03bdeae [2021-11-19 13:37:37,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:37:37,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:37:37,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:37:37,852 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:37:37,853 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:37:37,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-11-19 13:37:37,955 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/data/ff971ab65/fa092dc2ed6340c8aa7d4168008e8e74/FLAG00313f675 [2021-11-19 13:37:39,193 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:37:39,194 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-11-19 13:37:39,256 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/data/ff971ab65/fa092dc2ed6340c8aa7d4168008e8e74/FLAG00313f675 [2021-11-19 13:37:39,458 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/data/ff971ab65/fa092dc2ed6340c8aa7d4168008e8e74 [2021-11-19 13:37:39,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:37:39,465 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:37:39,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:39,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:37:39,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:37:39,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:39" (1/1) ... [2021-11-19 13:37:39,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34a69f65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:39, skipping insertion in model container [2021-11-19 13:37:39,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:39" (1/1) ... [2021-11-19 13:37:39,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:37:39,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:40,937 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:41,385 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:41,448 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:41,460 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:41,734 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:41,780 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:41,823 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:41,888 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,053 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,097 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,104 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,106 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,162 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,165 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,178 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,179 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,273 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,279 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,286 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,292 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,299 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,307 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:37:42,354 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i[269371,269384] [2021-11-19 13:37:42,492 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:42,556 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) [2021-11-19 13:37:42,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4244a5a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:42, skipping insertion in model container [2021-11-19 13:37:42,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:42,557 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:37:42,561 INFO L158 Benchmark]: Toolchain (without parser) took 3093.98ms. Allocated memory is still 130.0MB. Free memory was 85.5MB in the beginning and 76.3MB in the end (delta: 9.1MB). Peak memory consumption was 51.0MB. Max. memory is 16.1GB. [2021-11-19 13:37:42,563 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 90.2MB. Free memory was 46.8MB in the beginning and 46.7MB in the end (delta: 45.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:37:42,565 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3086.39ms. Allocated memory is still 130.0MB. Free memory was 85.1MB in the beginning and 76.3MB in the end (delta: 8.7MB). Peak memory consumption was 51.0MB. Max. memory is 16.1GB. [2021-11-19 13:37:42,568 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 90.2MB. Free memory was 46.8MB in the beginning and 46.7MB in the end (delta: 45.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3086.39ms. Allocated memory is still 130.0MB. Free memory was 85.1MB in the beginning and 76.3MB in the end (delta: 8.7MB). Peak memory consumption was 51.0MB. 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_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/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_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs --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-0f8a17c [2021-11-19 13:37:45,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:37:45,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:37:45,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:37:45,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:37:45,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:37:45,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:37:45,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:37:45,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:37:45,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:37:45,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:37:45,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:37:45,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:37:45,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:37:45,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:37:45,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:37:45,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:37:45,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:37:45,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:37:45,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:37:45,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:37:45,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:37:45,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:37:45,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:37:45,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:37:45,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:37:45,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:37:45,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:37:45,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:37:45,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:37:45,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:37:45,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:37:45,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:37:45,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:37:45,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:37:45,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:37:45,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:37:45,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:37:45,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:37:45,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:37:45,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:37:45,556 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 13:37:45,613 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:37:45,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:37:45,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:37:45,616 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:37:45,616 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:37:45,617 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:37:45,617 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:37:45,617 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:37:45,618 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:37:45,618 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:37:45,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:37:45,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:37:45,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:37:45,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:37:45,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:37:45,623 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:37:45,623 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:37:45,623 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:37:45,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:37:45,624 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:37:45,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:37:45,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:37:45,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:37:45,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:37:45,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:45,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:37:45,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:37:45,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:37:45,627 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:37:45,627 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:45,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:37:45,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:37:45,628 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:37:45,628 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_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2eef4809e0fb5b801f2479dfde07a6f5e1ac3784201f878d167f0654e03bdeae [2021-11-19 13:37:46,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:37:46,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:37:46,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:37:46,234 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:37:46,235 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:37:46,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-11-19 13:37:46,326 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/data/452616801/1530142e58b64ab18aa44ea811a54823/FLAG8bac3db9b [2021-11-19 13:37:47,603 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:37:47,604 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-11-19 13:37:47,680 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/data/452616801/1530142e58b64ab18aa44ea811a54823/FLAG8bac3db9b [2021-11-19 13:37:47,842 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/data/452616801/1530142e58b64ab18aa44ea811a54823 [2021-11-19 13:37:47,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:37:47,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:37:47,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:47,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:37:47,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:37:47,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:47" (1/1) ... [2021-11-19 13:37:47,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6939091e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:47, skipping insertion in model container [2021-11-19 13:37:47,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:47" (1/1) ... [2021-11-19 13:37:47,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:37:48,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:50,718 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i[269371,269384] [2021-11-19 13:37:50,842 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:50,886 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:37:50,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:51,597 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i[269371,269384] [2021-11-19 13:37:51,623 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:51,658 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:37:52,256 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i[269371,269384] [2021-11-19 13:37:52,280 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:52,535 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:37:52,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:52 WrapperNode [2021-11-19 13:37:52,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:52,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:37:52,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:37:52,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:37:52,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:52" (1/1) ... [2021-11-19 13:37:52,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:52" (1/1) ... [2021-11-19 13:37:53,067 INFO L137 Inliner]: procedures = 297, calls = 3066, calls flagged for inlining = 129, calls inlined = 120, statements flattened = 6584 [2021-11-19 13:37:53,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:37:53,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:37:53,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:37:53,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:37:53,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:52" (1/1) ... [2021-11-19 13:37:53,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:52" (1/1) ... [2021-11-19 13:37:53,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:52" (1/1) ... [2021-11-19 13:37:53,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:52" (1/1) ... [2021-11-19 13:37:53,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:52" (1/1) ... [2021-11-19 13:37:53,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:52" (1/1) ... [2021-11-19 13:37:53,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:52" (1/1) ... [2021-11-19 13:37:53,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:37:53,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:37:53,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:37:53,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:37:53,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:52" (1/1) ... [2021-11-19 13:37:53,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:37:53,563 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:37:53,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:37:53,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 13:37:53,627 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-19 13:37:53,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 13:37:53,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 13:37:53,627 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_del [2021-11-19 13:37:53,628 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_del [2021-11-19 13:37:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 13:37:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 13:37:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 13:37:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure driver_remove_file [2021-11-19 13:37:53,629 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_remove_file [2021-11-19 13:37:53,629 INFO L130 BoogieDeclarations]: Found specification of procedure find_partition [2021-11-19 13:37:53,629 INFO L138 BoogieDeclarations]: Found implementation of procedure find_partition [2021-11-19 13:37:53,629 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-19 13:37:53,629 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-19 13:37:53,630 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2021-11-19 13:37:53,630 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2021-11-19 13:37:53,630 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-19 13:37:53,630 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-19 13:37:53,630 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-19 13:37:53,631 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-19 13:37:53,631 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 13:37:53,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 13:37:53,631 INFO L130 BoogieDeclarations]: Found specification of procedure class_unregister [2021-11-19 13:37:53,631 INFO L138 BoogieDeclarations]: Found implementation of procedure class_unregister [2021-11-19 13:37:53,632 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-19 13:37:53,632 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-19 13:37:53,632 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-19 13:37:53,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-19 13:37:53,632 INFO L130 BoogieDeclarations]: Found specification of procedure tape_name [2021-11-19 13:37:53,633 INFO L138 BoogieDeclarations]: Found implementation of procedure tape_name [2021-11-19 13:37:53,633 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-19 13:37:53,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-19 13:37:53,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 13:37:53,634 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 13:37:53,634 INFO L130 BoogieDeclarations]: Found specification of procedure st_int_ioctl [2021-11-19 13:37:53,635 INFO L138 BoogieDeclarations]: Found implementation of procedure st_int_ioctl [2021-11-19 13:37:53,635 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_rq_timeout [2021-11-19 13:37:53,635 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_rq_timeout [2021-11-19 13:37:53,635 INFO L130 BoogieDeclarations]: Found specification of procedure set_mode_densblk [2021-11-19 13:37:53,635 INFO L138 BoogieDeclarations]: Found implementation of procedure set_mode_densblk [2021-11-19 13:37:53,636 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-19 13:37:53,636 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-19 13:37:53,636 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_ioctl [2021-11-19 13:37:53,636 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_ioctl [2021-11-19 13:37:53,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:37:53,637 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_st_ref_mutex [2021-11-19 13:37:53,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_st_ref_mutex [2021-11-19 13:37:53,637 INFO L130 BoogieDeclarations]: Found specification of procedure read_mode_page [2021-11-19 13:37:53,638 INFO L138 BoogieDeclarations]: Found implementation of procedure read_mode_page [2021-11-19 13:37:53,638 INFO L130 BoogieDeclarations]: Found specification of procedure do_door_lock [2021-11-19 13:37:53,639 INFO L138 BoogieDeclarations]: Found implementation of procedure do_door_lock [2021-11-19 13:37:53,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:37:53,640 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2021-11-19 13:37:53,641 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2021-11-19 13:37:53,641 INFO L130 BoogieDeclarations]: Found specification of procedure st_do_scsi [2021-11-19 13:37:53,641 INFO L138 BoogieDeclarations]: Found implementation of procedure st_do_scsi [2021-11-19 13:37:53,641 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-19 13:37:53,641 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-19 13:37:53,641 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-19 13:37:53,642 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2021-11-19 13:37:53,643 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2021-11-19 13:37:53,643 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2021-11-19 13:37:53,643 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2021-11-19 13:37:53,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 13:37:53,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 13:37:53,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 13:37:53,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:37:53,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 13:37:53,645 INFO L130 BoogieDeclarations]: Found specification of procedure st_release_request [2021-11-19 13:37:53,645 INFO L138 BoogieDeclarations]: Found implementation of procedure st_release_request [2021-11-19 13:37:53,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 13:37:53,646 INFO L130 BoogieDeclarations]: Found specification of procedure remove_cdevs [2021-11-19 13:37:53,646 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_cdevs [2021-11-19 13:37:53,646 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-19 13:37:53,647 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-19 13:37:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-19 13:37:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:37:53,647 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-19 13:37:53,647 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-19 13:37:53,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 13:37:53,648 INFO L130 BoogieDeclarations]: Found specification of procedure get_location [2021-11-19 13:37:53,648 INFO L138 BoogieDeclarations]: Found implementation of procedure get_location [2021-11-19 13:37:53,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 13:37:53,649 INFO L130 BoogieDeclarations]: Found specification of procedure st_compression [2021-11-19 13:37:53,650 INFO L138 BoogieDeclarations]: Found implementation of procedure st_compression [2021-11-19 13:37:53,650 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_put_device [2021-11-19 13:37:53,650 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_put_device [2021-11-19 13:37:53,650 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-11-19 13:37:53,650 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-11-19 13:37:53,651 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-19 13:37:53,652 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-19 13:37:53,652 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-19 13:37:53,653 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-19 13:37:53,653 INFO L130 BoogieDeclarations]: Found specification of procedure check_tape [2021-11-19 13:37:53,654 INFO L138 BoogieDeclarations]: Found implementation of procedure check_tape [2021-11-19 13:37:53,654 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-19 13:37:53,654 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-19 13:37:53,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-19 13:37:53,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-19 13:37:53,655 INFO L130 BoogieDeclarations]: Found specification of procedure switch_partition [2021-11-19 13:37:53,655 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_partition [2021-11-19 13:37:53,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_scsi_tape [2021-11-19 13:37:53,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_scsi_tape [2021-11-19 13:37:53,655 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-19 13:37:53,656 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-19 13:37:53,656 INFO L130 BoogieDeclarations]: Found specification of procedure setup_buffering [2021-11-19 13:37:53,656 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_buffering [2021-11-19 13:37:53,657 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-19 13:37:53,657 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-19 13:37:53,657 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_tape_put [2021-11-19 13:37:53,658 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_tape_put [2021-11-19 13:37:53,659 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_cmd_ioctl [2021-11-19 13:37:53,662 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_cmd_ioctl [2021-11-19 13:37:53,662 INFO L130 BoogieDeclarations]: Found specification of procedure create_one_cdev [2021-11-19 13:37:53,662 INFO L138 BoogieDeclarations]: Found implementation of procedure create_one_cdev [2021-11-19 13:37:53,663 INFO L130 BoogieDeclarations]: Found specification of procedure queue_dma_alignment [2021-11-19 13:37:53,665 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_dma_alignment [2021-11-19 13:37:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure do_load_unload [2021-11-19 13:37:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure do_load_unload [2021-11-19 13:37:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush_write_buffer [2021-11-19 13:37:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush_write_buffer [2021-11-19 13:37:53,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 13:37:53,673 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 13:37:53,673 INFO L130 BoogieDeclarations]: Found specification of procedure enlarge_buffer [2021-11-19 13:37:53,673 INFO L138 BoogieDeclarations]: Found implementation of procedure enlarge_buffer [2021-11-19 13:37:53,674 INFO L130 BoogieDeclarations]: Found specification of procedure cross_eof [2021-11-19 13:37:53,674 INFO L138 BoogieDeclarations]: Found implementation of procedure cross_eof [2021-11-19 13:37:53,674 INFO L130 BoogieDeclarations]: Found specification of procedure st_chk_result [2021-11-19 13:37:53,674 INFO L138 BoogieDeclarations]: Found implementation of procedure st_chk_result [2021-11-19 13:37:53,674 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2021-11-19 13:37:53,674 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2021-11-19 13:37:53,675 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 13:37:53,675 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 13:37:53,675 INFO L130 BoogieDeclarations]: Found specification of procedure write_behind_check [2021-11-19 13:37:53,675 INFO L138 BoogieDeclarations]: Found implementation of procedure write_behind_check [2021-11-19 13:37:53,675 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-19 13:37:53,676 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-19 13:37:53,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 13:37:53,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 13:37:53,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 13:37:53,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 13:37:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-19 13:37:53,677 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-19 13:37:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 13:37:53,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 13:37:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_st_ref_mutex [2021-11-19 13:37:53,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_st_ref_mutex [2021-11-19 13:37:53,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:37:53,678 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-19 13:37:53,678 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-19 13:37:53,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:37:53,678 INFO L130 BoogieDeclarations]: Found specification of procedure flush_buffer [2021-11-19 13:37:53,679 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_buffer [2021-11-19 13:37:53,679 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2021-11-19 13:37:53,679 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2021-11-19 13:37:53,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:37:53,679 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-19 13:37:53,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 13:37:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 13:37:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 13:37:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure driver_create_file [2021-11-19 13:37:53,680 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_create_file [2021-11-19 13:37:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure release_buffering [2021-11-19 13:37:53,681 INFO L138 BoogieDeclarations]: Found implementation of procedure release_buffering [2021-11-19 13:37:53,681 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2021-11-19 13:37:53,681 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2021-11-19 13:37:53,681 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_buffer [2021-11-19 13:37:53,681 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_buffer [2021-11-19 13:37:53,681 INFO L130 BoogieDeclarations]: Found specification of procedure write_mode_page [2021-11-19 13:37:53,682 INFO L138 BoogieDeclarations]: Found implementation of procedure write_mode_page [2021-11-19 13:37:53,682 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-19 13:37:53,682 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-19 13:37:53,682 INFO L130 BoogieDeclarations]: Found specification of procedure rw_checks [2021-11-19 13:37:53,682 INFO L138 BoogieDeclarations]: Found implementation of procedure rw_checks [2021-11-19 13:37:53,683 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2021-11-19 13:37:53,683 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2021-11-19 13:37:53,683 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2021-11-19 13:37:53,683 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2021-11-19 13:37:53,683 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_lock_of_scsi_tape [2021-11-19 13:37:53,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_lock_of_scsi_tape [2021-11-19 13:37:53,684 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-19 13:37:53,684 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-19 13:37:53,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 13:37:53,684 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_get_device [2021-11-19 13:37:53,685 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_get_device [2021-11-19 13:37:53,685 INFO L130 BoogieDeclarations]: Found specification of procedure set_location [2021-11-19 13:37:53,685 INFO L138 BoogieDeclarations]: Found implementation of procedure set_location [2021-11-19 13:37:53,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:37:53,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:37:54,904 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:37:54,910 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:39:26,834 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:39:26,862 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:39:26,863 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 13:39:26,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:39:26 BoogieIcfgContainer [2021-11-19 13:39:26,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:39:26,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:39:26,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:39:26,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:39:26,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:37:47" (1/3) ... [2021-11-19 13:39:26,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4408fb59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:39:26, skipping insertion in model container [2021-11-19 13:39:26,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:52" (2/3) ... [2021-11-19 13:39:26,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4408fb59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:39:26, skipping insertion in model container [2021-11-19 13:39:26,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:39:26" (3/3) ... [2021-11-19 13:39:26,882 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--scsi--st.ko-ldv_main0.cil.out.i [2021-11-19 13:39:26,889 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:39:26,889 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:39:26,993 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:39:27,004 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 [2021-11-19 13:39:27,005 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:39:27,103 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) [2021-11-19 13:39:27,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 13:39:27,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:27,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:39:27,113 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:27,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:27,121 INFO L85 PathProgramCache]: Analyzing trace with hash 138079915, now seen corresponding path program 1 times [2021-11-19 13:39:27,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:27,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118561737] [2021-11-19 13:39:27,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:27,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:27,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:27,150 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:27,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:39:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:29,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:39:29,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:29,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:29,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:29,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118561737] [2021-11-19 13:39:29,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118561737] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:29,621 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:29,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-19 13:39:29,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253571787] [2021-11-19 13:39:29,625 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:29,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:39:29,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:29,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:39:29,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:39:29,680 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) [2021-11-19 13:39:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:30,137 INFO L93 Difference]: Finished difference Result 4222 states and 6502 transitions. [2021-11-19 13:39:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:39:30,141 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 [2021-11-19 13:39:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:30,211 INFO L225 Difference]: With dead ends: 4222 [2021-11-19 13:39:30,213 INFO L226 Difference]: Without dead ends: 2109 [2021-11-19 13:39:30,253 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 [2021-11-19 13:39:30,261 INFO L933 BasicCegarLoop]: 3187 mSDtfsCounter, 3182 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3182 SdHoareTripleChecker+Valid, 3187 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:30,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3182 Valid, 3187 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:39:30,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-11-19 13:39:30,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2109. [2021-11-19 13:39:30,576 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) [2021-11-19 13:39:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 3184 transitions. [2021-11-19 13:39:30,614 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 3184 transitions. Word has length 18 [2021-11-19 13:39:30,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:30,616 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 3184 transitions. [2021-11-19 13:39:30,617 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) [2021-11-19 13:39:30,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 3184 transitions. [2021-11-19 13:39:30,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 13:39:30,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:30,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:39:30,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:30,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:30,837 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:30,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:30,838 INFO L85 PathProgramCache]: Analyzing trace with hash 839144493, now seen corresponding path program 1 times [2021-11-19 13:39:30,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:30,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120416305] [2021-11-19 13:39:30,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:30,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:30,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:30,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:30,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:39:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:32,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:39:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:32,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:33,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:33,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120416305] [2021-11-19 13:39:33,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120416305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:33,001 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:33,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:39:33,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011991608] [2021-11-19 13:39:33,001 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:33,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:39:33,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:33,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:39:33,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:39:33,005 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) [2021-11-19 13:39:35,205 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 [] [2021-11-19 13:39:35,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:35,425 INFO L93 Difference]: Finished difference Result 2111 states and 3185 transitions. [2021-11-19 13:39:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:39:35,426 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 [2021-11-19 13:39:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:35,456 INFO L225 Difference]: With dead ends: 2111 [2021-11-19 13:39:35,456 INFO L226 Difference]: Without dead ends: 2108 [2021-11-19 13:39:35,459 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 [2021-11-19 13:39:35,463 INFO L933 BasicCegarLoop]: 3181 mSDtfsCounter, 3167 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3167 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:35,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3167 Valid, 3181 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 13:39:35,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-11-19 13:39:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2108. [2021-11-19 13:39:35,601 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) [2021-11-19 13:39:35,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3182 transitions. [2021-11-19 13:39:35,630 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3182 transitions. Word has length 18 [2021-11-19 13:39:35,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:35,630 INFO L470 AbstractCegarLoop]: Abstraction has 2108 states and 3182 transitions. [2021-11-19 13:39:35,631 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) [2021-11-19 13:39:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3182 transitions. [2021-11-19 13:39:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 13:39:35,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:35,633 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:39:35,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:35,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:35,849 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:35,850 INFO L85 PathProgramCache]: Analyzing trace with hash 242977281, now seen corresponding path program 1 times [2021-11-19 13:39:35,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:35,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905733834] [2021-11-19 13:39:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:35,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:35,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:35,853 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:35,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:39:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:37,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:39:37,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:37,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:38,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:38,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905733834] [2021-11-19 13:39:38,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905733834] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:38,014 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:38,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:39:38,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196414692] [2021-11-19 13:39:38,015 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:38,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:39:38,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:38,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:39:38,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:39:38,017 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) [2021-11-19 13:39:40,259 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:39:40,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:40,781 INFO L93 Difference]: Finished difference Result 6200 states and 9372 transitions. [2021-11-19 13:39:40,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:39:40,782 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 [2021-11-19 13:39:40,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:40,837 INFO L225 Difference]: With dead ends: 6200 [2021-11-19 13:39:40,838 INFO L226 Difference]: Without dead ends: 4133 [2021-11-19 13:39:40,857 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 [2021-11-19 13:39:40,862 INFO L933 BasicCegarLoop]: 4118 mSDtfsCounter, 3162 mSDsluCounter, 3058 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3162 SdHoareTripleChecker+Valid, 7176 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:40,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3162 Valid, 7176 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 13:39:40,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-11-19 13:39:41,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 4128. [2021-11-19 13:39:41,145 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) [2021-11-19 13:39:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 6240 transitions. [2021-11-19 13:39:41,202 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 6240 transitions. Word has length 19 [2021-11-19 13:39:41,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:41,203 INFO L470 AbstractCegarLoop]: Abstraction has 4128 states and 6240 transitions. [2021-11-19 13:39:41,207 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) [2021-11-19 13:39:41,207 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 6240 transitions. [2021-11-19 13:39:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 13:39:41,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:41,211 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] [2021-11-19 13:39:41,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:41,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:41,434 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:41,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1058332240, now seen corresponding path program 1 times [2021-11-19 13:39:41,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:41,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564843796] [2021-11-19 13:39:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:41,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:41,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:41,442 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:41,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:39:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:42,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 1134 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:39:42,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:43,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:43,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:43,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564843796] [2021-11-19 13:39:43,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564843796] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:43,479 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:43,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:39:43,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842102451] [2021-11-19 13:39:43,480 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:43,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:39:43,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:43,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:39:43,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:39:43,482 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) [2021-11-19 13:39:45,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:39:45,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:45,958 INFO L93 Difference]: Finished difference Result 4130 states and 6241 transitions. [2021-11-19 13:39:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:39:45,959 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 [2021-11-19 13:39:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:46,011 INFO L225 Difference]: With dead ends: 4130 [2021-11-19 13:39:46,011 INFO L226 Difference]: Without dead ends: 4127 [2021-11-19 13:39:46,016 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 [2021-11-19 13:39:46,019 INFO L933 BasicCegarLoop]: 3179 mSDtfsCounter, 3163 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3163 SdHoareTripleChecker+Valid, 3179 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:46,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3163 Valid, 3179 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 13:39:46,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-11-19 13:39:46,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 4127. [2021-11-19 13:39:46,301 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) [2021-11-19 13:39:46,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4127 states to 4127 states and 6238 transitions. [2021-11-19 13:39:46,335 INFO L78 Accepts]: Start accepts. Automaton has 4127 states and 6238 transitions. Word has length 20 [2021-11-19 13:39:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:46,335 INFO L470 AbstractCegarLoop]: Abstraction has 4127 states and 6238 transitions. [2021-11-19 13:39:46,336 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) [2021-11-19 13:39:46,336 INFO L276 IsEmpty]: Start isEmpty. Operand 4127 states and 6238 transitions. [2021-11-19 13:39:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 13:39:46,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:46,341 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] [2021-11-19 13:39:46,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:46,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:46,560 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:46,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:46,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1550750436, now seen corresponding path program 1 times [2021-11-19 13:39:46,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:46,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037428050] [2021-11-19 13:39:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:46,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:46,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:46,565 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:46,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:39:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:48,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:39:48,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:48,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:48,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:48,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037428050] [2021-11-19 13:39:48,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037428050] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:48,754 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:48,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:39:48,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3769876] [2021-11-19 13:39:48,755 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:48,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:39:48,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:48,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:39:48,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:39:48,756 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) [2021-11-19 13:39:50,913 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:39:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:51,228 INFO L93 Difference]: Finished difference Result 4199 states and 6296 transitions. [2021-11-19 13:39:51,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:39:51,229 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 [2021-11-19 13:39:51,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:51,277 INFO L225 Difference]: With dead ends: 4199 [2021-11-19 13:39:51,277 INFO L226 Difference]: Without dead ends: 4178 [2021-11-19 13:39:51,282 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 [2021-11-19 13:39:51,283 INFO L933 BasicCegarLoop]: 3181 mSDtfsCounter, 2998 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2998 SdHoareTripleChecker+Valid, 3366 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:51,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2998 Valid, 3366 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 13:39:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2021-11-19 13:39:51,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 4176. [2021-11-19 13:39:51,566 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) [2021-11-19 13:39:51,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 6258 transitions. [2021-11-19 13:39:51,604 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 6258 transitions. Word has length 21 [2021-11-19 13:39:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:51,605 INFO L470 AbstractCegarLoop]: Abstraction has 4176 states and 6258 transitions. [2021-11-19 13:39:51,607 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) [2021-11-19 13:39:51,607 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 6258 transitions. [2021-11-19 13:39:51,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 13:39:51,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:51,624 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] [2021-11-19 13:39:51,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:51,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:51,849 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:51,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:51,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1666647660, now seen corresponding path program 1 times [2021-11-19 13:39:51,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:51,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528409569] [2021-11-19 13:39:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:51,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:51,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:51,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:51,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:39:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:53,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 1277 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:39:53,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:53,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:39:54,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:54,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528409569] [2021-11-19 13:39:54,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528409569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:54,339 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:54,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 13:39:54,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813860782] [2021-11-19 13:39:54,339 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:54,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:39:54,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:54,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:39:54,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:39:54,342 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) [2021-11-19 13:39:54,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:54,811 INFO L93 Difference]: Finished difference Result 8301 states and 12450 transitions. [2021-11-19 13:39:54,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:39:54,812 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 [2021-11-19 13:39:54,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:54,861 INFO L225 Difference]: With dead ends: 8301 [2021-11-19 13:39:54,861 INFO L226 Difference]: Without dead ends: 4176 [2021-11-19 13:39:54,890 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 [2021-11-19 13:39:54,893 INFO L933 BasicCegarLoop]: 3172 mSDtfsCounter, 1 mSDsluCounter, 6338 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9510 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:54,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 9510 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:39:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-11-19 13:39:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 4176. [2021-11-19 13:39:55,174 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) [2021-11-19 13:39:55,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 6257 transitions. [2021-11-19 13:39:55,203 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 6257 transitions. Word has length 61 [2021-11-19 13:39:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:55,203 INFO L470 AbstractCegarLoop]: Abstraction has 4176 states and 6257 transitions. [2021-11-19 13:39:55,203 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) [2021-11-19 13:39:55,204 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 6257 transitions. [2021-11-19 13:39:55,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 13:39:55,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:55,210 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] [2021-11-19 13:39:55,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:55,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:55,425 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:55,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:55,426 INFO L85 PathProgramCache]: Analyzing trace with hash -517621178, now seen corresponding path program 1 times [2021-11-19 13:39:55,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:55,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348028236] [2021-11-19 13:39:55,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:55,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:55,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:55,429 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:55,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:39:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:57,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:39:57,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:39:57,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:39:58,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:58,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348028236] [2021-11-19 13:39:58,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348028236] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:58,047 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:58,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 13:39:58,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754921337] [2021-11-19 13:39:58,047 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:58,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:39:58,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:58,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:39:58,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:39:58,048 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) [2021-11-19 13:39:58,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:58,654 INFO L93 Difference]: Finished difference Result 8301 states and 12449 transitions. [2021-11-19 13:39:58,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:39:58,655 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 [2021-11-19 13:39:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:58,729 INFO L225 Difference]: With dead ends: 8301 [2021-11-19 13:39:58,730 INFO L226 Difference]: Without dead ends: 4163 [2021-11-19 13:39:58,759 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 [2021-11-19 13:39:58,761 INFO L933 BasicCegarLoop]: 3170 mSDtfsCounter, 3 mSDsluCounter, 9492 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12662 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:58,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12662 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:39:58,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4163 states. [2021-11-19 13:39:59,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4163 to 4163. [2021-11-19 13:39:59,020 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) [2021-11-19 13:39:59,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 6241 transitions. [2021-11-19 13:39:59,049 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 6241 transitions. Word has length 68 [2021-11-19 13:39:59,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:59,050 INFO L470 AbstractCegarLoop]: Abstraction has 4163 states and 6241 transitions. [2021-11-19 13:39:59,050 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) [2021-11-19 13:39:59,050 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 6241 transitions. [2021-11-19 13:39:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 13:39:59,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:59,057 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] [2021-11-19 13:39:59,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:59,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:59,271 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:59,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:59,272 INFO L85 PathProgramCache]: Analyzing trace with hash -252154144, now seen corresponding path program 1 times [2021-11-19 13:39:59,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:59,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513794209] [2021-11-19 13:39:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:59,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:59,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:59,275 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:59,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:40:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:00,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:40:00,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:40:01,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:40:01,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:40:01,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513794209] [2021-11-19 13:40:01,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513794209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:40:01,815 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:40:01,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 13:40:01,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362445707] [2021-11-19 13:40:01,816 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:40:01,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:40:01,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:40:01,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:40:01,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:40:01,818 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) [2021-11-19 13:40:02,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:40:02,238 INFO L93 Difference]: Finished difference Result 8290 states and 12435 transitions. [2021-11-19 13:40:02,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:40:02,239 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 [2021-11-19 13:40:02,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:40:02,267 INFO L225 Difference]: With dead ends: 8290 [2021-11-19 13:40:02,267 INFO L226 Difference]: Without dead ends: 4163 [2021-11-19 13:40:02,297 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 [2021-11-19 13:40:02,298 INFO L933 BasicCegarLoop]: 3161 mSDtfsCounter, 1 mSDsluCounter, 6310 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9471 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:40:02,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 9471 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:40:02,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4163 states. [2021-11-19 13:40:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4163 to 4163. [2021-11-19 13:40:02,553 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) [2021-11-19 13:40:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 6240 transitions. [2021-11-19 13:40:02,581 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 6240 transitions. Word has length 73 [2021-11-19 13:40:02,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:40:02,582 INFO L470 AbstractCegarLoop]: Abstraction has 4163 states and 6240 transitions. [2021-11-19 13:40:02,582 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) [2021-11-19 13:40:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 6240 transitions. [2021-11-19 13:40:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 13:40:02,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:40:02,588 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] [2021-11-19 13:40:02,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-19 13:40:02,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:40:02,802 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:40:02,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:40:02,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1320600162, now seen corresponding path program 1 times [2021-11-19 13:40:02,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:40:02,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865995845] [2021-11-19 13:40:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:02,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:40:02,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:40:02,806 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:40:02,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:40:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:04,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1340 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:40:04,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:40:04,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:40:05,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:40:05,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865995845] [2021-11-19 13:40:05,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865995845] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:40:05,414 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:40:05,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 13:40:05,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047035475] [2021-11-19 13:40:05,415 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:40:05,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:40:05,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:40:05,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:40:05,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:40:05,417 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) [2021-11-19 13:40:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:40:05,992 INFO L93 Difference]: Finished difference Result 8290 states and 12434 transitions. [2021-11-19 13:40:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:40:05,993 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 [2021-11-19 13:40:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:40:06,021 INFO L225 Difference]: With dead ends: 8290 [2021-11-19 13:40:06,021 INFO L226 Difference]: Without dead ends: 4156 [2021-11-19 13:40:06,045 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 [2021-11-19 13:40:06,049 INFO L933 BasicCegarLoop]: 3159 mSDtfsCounter, 3 mSDsluCounter, 9453 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12612 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:40:06,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12612 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:40:06,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2021-11-19 13:40:06,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 4156. [2021-11-19 13:40:06,269 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) [2021-11-19 13:40:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4156 states to 4156 states and 6228 transitions. [2021-11-19 13:40:06,294 INFO L78 Accepts]: Start accepts. Automaton has 4156 states and 6228 transitions. Word has length 84 [2021-11-19 13:40:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:40:06,295 INFO L470 AbstractCegarLoop]: Abstraction has 4156 states and 6228 transitions. [2021-11-19 13:40:06,295 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) [2021-11-19 13:40:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 4156 states and 6228 transitions. [2021-11-19 13:40:06,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 13:40:06,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:40:06,300 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] [2021-11-19 13:40:06,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:06,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:40:06,514 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:40:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:40:06,515 INFO L85 PathProgramCache]: Analyzing trace with hash 137726031, now seen corresponding path program 1 times [2021-11-19 13:40:06,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:40:06,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398978145] [2021-11-19 13:40:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:06,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:40:06,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:40:06,517 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:40:06,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:40:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:08,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:40:08,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 13:40:08,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 13:40:09,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:40:09,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398978145] [2021-11-19 13:40:09,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398978145] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:40:09,463 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:40:09,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-19 13:40:09,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926161101] [2021-11-19 13:40:09,463 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:40:09,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:40:09,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:40:09,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:40:09,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:40:09,464 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) [2021-11-19 13:40:12,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:40:12,314 INFO L93 Difference]: Finished difference Result 7554 states and 11586 transitions. [2021-11-19 13:40:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:40:12,315 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 [2021-11-19 13:40:12,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:40:12,352 INFO L225 Difference]: With dead ends: 7554 [2021-11-19 13:40:12,352 INFO L226 Difference]: Without dead ends: 6531 [2021-11-19 13:40:12,360 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 [2021-11-19 13:40:12,361 INFO L933 BasicCegarLoop]: 4665 mSDtfsCounter, 2970 mSDsluCounter, 22010 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3120 SdHoareTripleChecker+Valid, 26675 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:40:12,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3120 Valid, 26675 Invalid, 621 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [448 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 13:40:12,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6531 states. [2021-11-19 13:40:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6531 to 3838. [2021-11-19 13:40:12,660 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) [2021-11-19 13:40:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 5700 transitions. [2021-11-19 13:40:12,684 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 5700 transitions. Word has length 91 [2021-11-19 13:40:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:40:12,685 INFO L470 AbstractCegarLoop]: Abstraction has 3838 states and 5700 transitions. [2021-11-19 13:40:12,685 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) [2021-11-19 13:40:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 5700 transitions. [2021-11-19 13:40:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 13:40:12,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:40:12,690 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] [2021-11-19 13:40:12,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:12,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:40:12,905 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:40:12,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:40:12,906 INFO L85 PathProgramCache]: Analyzing trace with hash 982197902, now seen corresponding path program 1 times [2021-11-19 13:40:12,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:40:12,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582721806] [2021-11-19 13:40:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:12,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:40:12,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:40:12,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:40:12,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:40:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:14,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:40:14,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 13:40:14,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 13:40:15,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:40:15,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582721806] [2021-11-19 13:40:15,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582721806] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:40:15,366 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:40:15,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:40:15,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552672400] [2021-11-19 13:40:15,366 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:40:15,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:40:15,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:40:15,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:40:15,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:40:15,369 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) [2021-11-19 13:40:17,582 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:40:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:40:17,887 INFO L93 Difference]: Finished difference Result 7646 states and 11364 transitions. [2021-11-19 13:40:17,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:40:17,887 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 [2021-11-19 13:40:17,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:40:17,910 INFO L225 Difference]: With dead ends: 7646 [2021-11-19 13:40:17,910 INFO L226 Difference]: Without dead ends: 3841 [2021-11-19 13:40:17,926 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 [2021-11-19 13:40:17,927 INFO L933 BasicCegarLoop]: 5012 mSDtfsCounter, 3040 mSDsluCounter, 2577 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3040 SdHoareTripleChecker+Valid, 7589 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:40:17,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3040 Valid, 7589 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 13:40:17,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2021-11-19 13:40:18,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3838. [2021-11-19 13:40:18,176 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) [2021-11-19 13:40:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 5692 transitions. [2021-11-19 13:40:18,199 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 5692 transitions. Word has length 91 [2021-11-19 13:40:18,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:40:18,200 INFO L470 AbstractCegarLoop]: Abstraction has 3838 states and 5692 transitions. [2021-11-19 13:40:18,201 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) [2021-11-19 13:40:18,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 5692 transitions. [2021-11-19 13:40:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 13:40:18,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:40:18,206 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] [2021-11-19 13:40:18,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:18,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:40:18,421 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:40:18,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:40:18,422 INFO L85 PathProgramCache]: Analyzing trace with hash -790775421, now seen corresponding path program 1 times [2021-11-19 13:40:18,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:40:18,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174659481] [2021-11-19 13:40:18,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:18,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:40:18,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:40:18,426 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:40:18,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:40:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:20,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:40:20,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:40:21,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 13:40:21,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:40:21,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174659481] [2021-11-19 13:40:21,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174659481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:40:21,756 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:40:21,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:40:21,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619742635] [2021-11-19 13:40:21,756 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:40:21,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:40:21,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:40:21,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:40:21,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:40:21,758 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) [2021-11-19 13:40:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:40:23,860 INFO L93 Difference]: Finished difference Result 9273 states and 13960 transitions. [2021-11-19 13:40:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:40:23,861 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 [2021-11-19 13:40:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:40:23,888 INFO L225 Difference]: With dead ends: 9273 [2021-11-19 13:40:23,888 INFO L226 Difference]: Without dead ends: 5468 [2021-11-19 13:40:23,901 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 [2021-11-19 13:40:23,902 INFO L933 BasicCegarLoop]: 3345 mSDtfsCounter, 2570 mSDsluCounter, 3669 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2838 SdHoareTripleChecker+Valid, 7014 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:40:23,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2838 Valid, 7014 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 13:40:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5468 states. [2021-11-19 13:40:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5468 to 5422. [2021-11-19 13:40:24,270 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) [2021-11-19 13:40:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5422 states to 5422 states and 8228 transitions. [2021-11-19 13:40:24,302 INFO L78 Accepts]: Start accepts. Automaton has 5422 states and 8228 transitions. Word has length 93 [2021-11-19 13:40:24,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:40:24,303 INFO L470 AbstractCegarLoop]: Abstraction has 5422 states and 8228 transitions. [2021-11-19 13:40:24,304 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) [2021-11-19 13:40:24,304 INFO L276 IsEmpty]: Start isEmpty. Operand 5422 states and 8228 transitions. [2021-11-19 13:40:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 13:40:24,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:40:24,310 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] [2021-11-19 13:40:24,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:24,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:40:24,525 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:40:24,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:40:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash 849555907, now seen corresponding path program 1 times [2021-11-19 13:40:24,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:40:24,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714969496] [2021-11-19 13:40:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:24,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:40:24,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:40:24,530 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:40:24,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:40:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:26,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:40:26,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 13:40:26,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 13:40:27,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:40:27,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714969496] [2021-11-19 13:40:27,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714969496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:40:27,447 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:40:27,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-19 13:40:27,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637141000] [2021-11-19 13:40:27,448 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:40:27,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:40:27,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:40:27,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:40:27,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:40:27,450 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) [2021-11-19 13:40:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:40:29,093 INFO L93 Difference]: Finished difference Result 9401 states and 14342 transitions. [2021-11-19 13:40:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:40:29,094 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 [2021-11-19 13:40:29,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:40:29,128 INFO L225 Difference]: With dead ends: 9401 [2021-11-19 13:40:29,128 INFO L226 Difference]: Without dead ends: 7690 [2021-11-19 13:40:29,138 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 [2021-11-19 13:40:29,139 INFO L933 BasicCegarLoop]: 4246 mSDtfsCounter, 2510 mSDsluCounter, 14087 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2511 SdHoareTripleChecker+Valid, 18333 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:40:29,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2511 Valid, 18333 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 13:40:29,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7690 states. [2021-11-19 13:40:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7690 to 5419. [2021-11-19 13:40:29,671 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) [2021-11-19 13:40:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 8222 transitions. [2021-11-19 13:40:29,704 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 8222 transitions. Word has length 108 [2021-11-19 13:40:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:40:29,705 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 8222 transitions. [2021-11-19 13:40:29,705 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) [2021-11-19 13:40:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 8222 transitions. [2021-11-19 13:40:29,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 13:40:29,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:40:29,711 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] [2021-11-19 13:40:29,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:29,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:40:29,929 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:40:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:40:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash -389306663, now seen corresponding path program 1 times [2021-11-19 13:40:29,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:40:29,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835270676] [2021-11-19 13:40:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:29,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:40:29,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:40:29,934 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:40:29,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:40:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:31,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:40:31,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:40:32,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:40:33,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:40:33,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835270676] [2021-11-19 13:40:33,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835270676] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:40:33,600 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:40:33,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:40:33,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92609753] [2021-11-19 13:40:33,601 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:40:33,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:40:33,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:40:33,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:40:33,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:40:33,602 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) [2021-11-19 13:40:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:40:36,223 INFO L93 Difference]: Finished difference Result 15881 states and 24668 transitions. [2021-11-19 13:40:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:40:36,224 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 [2021-11-19 13:40:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:40:36,272 INFO L225 Difference]: With dead ends: 15881 [2021-11-19 13:40:36,272 INFO L226 Difference]: Without dead ends: 10495 [2021-11-19 13:40:36,363 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 [2021-11-19 13:40:36,364 INFO L933 BasicCegarLoop]: 4408 mSDtfsCounter, 3235 mSDsluCounter, 4242 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3571 SdHoareTripleChecker+Valid, 8650 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:40:36,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3571 Valid, 8650 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 13:40:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-11-19 13:40:37,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 9851. [2021-11-19 13:40:37,164 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) [2021-11-19 13:40:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9851 states to 9851 states and 15418 transitions. [2021-11-19 13:40:37,218 INFO L78 Accepts]: Start accepts. Automaton has 9851 states and 15418 transitions. Word has length 112 [2021-11-19 13:40:37,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:40:37,219 INFO L470 AbstractCegarLoop]: Abstraction has 9851 states and 15418 transitions. [2021-11-19 13:40:37,219 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) [2021-11-19 13:40:37,220 INFO L276 IsEmpty]: Start isEmpty. Operand 9851 states and 15418 transitions. [2021-11-19 13:40:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 13:40:37,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:40:37,228 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] [2021-11-19 13:40:37,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:37,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:40:37,453 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:40:37,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:40:37,454 INFO L85 PathProgramCache]: Analyzing trace with hash -478466939, now seen corresponding path program 1 times [2021-11-19 13:40:37,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:40:37,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254560718] [2021-11-19 13:40:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:37,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:40:37,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:40:37,458 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:40:37,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:40:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:39,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:40:39,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:40:40,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:40:40,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:40:40,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254560718] [2021-11-19 13:40:40,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254560718] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:40:40,694 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:40:40,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:40:40,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211129886] [2021-11-19 13:40:40,695 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:40:40,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:40:40,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:40:40,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:40:40,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:40:40,697 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) [2021-11-19 13:40:42,862 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:40:43,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:40:43,418 INFO L93 Difference]: Finished difference Result 9853 states and 15419 transitions. [2021-11-19 13:40:43,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:40:43,419 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 [2021-11-19 13:40:43,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:40:43,456 INFO L225 Difference]: With dead ends: 9853 [2021-11-19 13:40:43,456 INFO L226 Difference]: Without dead ends: 9850 [2021-11-19 13:40:43,462 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 [2021-11-19 13:40:43,463 INFO L933 BasicCegarLoop]: 3170 mSDtfsCounter, 145 mSDsluCounter, 2988 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 6158 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:40:43,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 6158 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 13:40:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9850 states. [2021-11-19 13:40:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9850 to 9850. [2021-11-19 13:40:44,360 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) [2021-11-19 13:40:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9850 states to 9850 states and 15415 transitions. [2021-11-19 13:40:44,418 INFO L78 Accepts]: Start accepts. Automaton has 9850 states and 15415 transitions. Word has length 111 [2021-11-19 13:40:44,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:40:44,419 INFO L470 AbstractCegarLoop]: Abstraction has 9850 states and 15415 transitions. [2021-11-19 13:40:44,420 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) [2021-11-19 13:40:44,420 INFO L276 IsEmpty]: Start isEmpty. Operand 9850 states and 15415 transitions. [2021-11-19 13:40:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-19 13:40:44,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:40:44,457 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] [2021-11-19 13:40:44,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:44,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:40:44,671 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:40:44,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:40:44,672 INFO L85 PathProgramCache]: Analyzing trace with hash 328878096, now seen corresponding path program 1 times [2021-11-19 13:40:44,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:40:44,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753754899] [2021-11-19 13:40:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:44,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:40:44,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:40:44,676 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:40:44,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:40:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:46,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:40:46,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:40:47,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 13:40:47,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:40:47,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753754899] [2021-11-19 13:40:47,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753754899] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:40:47,981 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:40:47,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:40:47,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998635892] [2021-11-19 13:40:47,982 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:40:47,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:40:47,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:40:47,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:40:47,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:40:47,984 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) [2021-11-19 13:40:49,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:40:49,075 INFO L93 Difference]: Finished difference Result 19751 states and 30918 transitions. [2021-11-19 13:40:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:40:49,076 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 [2021-11-19 13:40:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:40:49,111 INFO L225 Difference]: With dead ends: 19751 [2021-11-19 13:40:49,111 INFO L226 Difference]: Without dead ends: 9907 [2021-11-19 13:40:49,138 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 [2021-11-19 13:40:49,139 INFO L933 BasicCegarLoop]: 3189 mSDtfsCounter, 50 mSDsluCounter, 9489 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 12678 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:40:49,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 12678 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:40:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9907 states. [2021-11-19 13:40:49,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9907 to 9838. [2021-11-19 13:40:49,938 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) [2021-11-19 13:40:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9838 states to 9838 states and 15388 transitions. [2021-11-19 13:40:49,997 INFO L78 Accepts]: Start accepts. Automaton has 9838 states and 15388 transitions. Word has length 174 [2021-11-19 13:40:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:40:49,998 INFO L470 AbstractCegarLoop]: Abstraction has 9838 states and 15388 transitions. [2021-11-19 13:40:49,998 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) [2021-11-19 13:40:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 9838 states and 15388 transitions. [2021-11-19 13:40:50,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-19 13:40:50,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:40:50,047 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] [2021-11-19 13:40:50,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:50,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:40:50,261 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:40:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:40:50,262 INFO L85 PathProgramCache]: Analyzing trace with hash 841504615, now seen corresponding path program 1 times [2021-11-19 13:40:50,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:40:50,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028350422] [2021-11-19 13:40:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:50,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:40:50,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:40:50,265 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:40:50,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:40:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:52,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1850 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:40:52,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-19 13:40:54,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-19 13:40:55,508 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:40:55,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028350422] [2021-11-19 13:40:55,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028350422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:40:55,508 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:40:55,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:40:55,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008201429] [2021-11-19 13:40:55,509 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:40:55,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:40:55,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:40:55,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:40:55,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:40:55,512 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) [2021-11-19 13:40:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:40:56,402 INFO L93 Difference]: Finished difference Result 19705 states and 30825 transitions. [2021-11-19 13:40:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:40:56,403 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 [2021-11-19 13:40:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:40:56,444 INFO L225 Difference]: With dead ends: 19705 [2021-11-19 13:40:56,444 INFO L226 Difference]: Without dead ends: 9846 [2021-11-19 13:40:56,472 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 [2021-11-19 13:40:56,473 INFO L933 BasicCegarLoop]: 3179 mSDtfsCounter, 34 mSDsluCounter, 9494 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 12673 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:40:56,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 12673 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:40:56,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9846 states. [2021-11-19 13:40:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9846 to 9780. [2021-11-19 13:40:57,294 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) [2021-11-19 13:40:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9780 states to 9780 states and 15273 transitions. [2021-11-19 13:40:57,355 INFO L78 Accepts]: Start accepts. Automaton has 9780 states and 15273 transitions. Word has length 289 [2021-11-19 13:40:57,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:40:57,356 INFO L470 AbstractCegarLoop]: Abstraction has 9780 states and 15273 transitions. [2021-11-19 13:40:57,356 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) [2021-11-19 13:40:57,356 INFO L276 IsEmpty]: Start isEmpty. Operand 9780 states and 15273 transitions. [2021-11-19 13:40:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-19 13:40:57,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:40:57,389 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] [2021-11-19 13:40:57,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:57,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:40:57,606 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:40:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:40:57,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2051310902, now seen corresponding path program 1 times [2021-11-19 13:40:57,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:40:57,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835146034] [2021-11-19 13:40:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:57,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:40:57,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:40:57,611 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:40:57,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:40:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 1802 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:40:59,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:41:02,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 13:41:04,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:41:04,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835146034] [2021-11-19 13:41:04,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835146034] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:41:04,504 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:41:04,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 16 [2021-11-19 13:41:04,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323989786] [2021-11-19 13:41:04,505 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:41:04,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 13:41:04,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:41:04,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 13:41:04,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:41:04,508 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) [2021-11-19 13:41:09,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:41:11,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:41:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:41:12,872 INFO L93 Difference]: Finished difference Result 19761 states and 30867 transitions. [2021-11-19 13:41:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 13:41:12,873 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 [2021-11-19 13:41:12,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:41:12,920 INFO L225 Difference]: With dead ends: 19761 [2021-11-19 13:41:12,920 INFO L226 Difference]: Without dead ends: 9931 [2021-11-19 13:41:12,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-11-19 13:41:12,951 INFO L933 BasicCegarLoop]: 3205 mSDtfsCounter, 216 mSDsluCounter, 35029 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 169 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 38234 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:41:12,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 38234 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 161 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2021-11-19 13:41:12,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9931 states. [2021-11-19 13:41:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9931 to 9783. [2021-11-19 13:41:13,479 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) [2021-11-19 13:41:13,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9783 states to 9783 states and 15266 transitions. [2021-11-19 13:41:13,530 INFO L78 Accepts]: Start accepts. Automaton has 9783 states and 15266 transitions. Word has length 269 [2021-11-19 13:41:13,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:41:13,531 INFO L470 AbstractCegarLoop]: Abstraction has 9783 states and 15266 transitions. [2021-11-19 13:41:13,532 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) [2021-11-19 13:41:13,532 INFO L276 IsEmpty]: Start isEmpty. Operand 9783 states and 15266 transitions. [2021-11-19 13:41:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-11-19 13:41:13,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:41:13,567 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] [2021-11-19 13:41:13,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:41:13,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:41:13,793 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:41:13,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:41:13,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1149954087, now seen corresponding path program 1 times [2021-11-19 13:41:13,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:41:13,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244936128] [2021-11-19 13:41:13,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:13,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:41:13,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:41:13,797 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:41:13,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:41:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:41:15,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1959 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:41:15,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 13:41:17,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 13:41:18,744 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:41:18,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244936128] [2021-11-19 13:41:18,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244936128] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:41:18,745 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:41:18,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:41:18,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90475533] [2021-11-19 13:41:18,746 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:41:18,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:41:18,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:41:18,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:41:18,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:41:18,749 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) [2021-11-19 13:41:19,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:41:19,538 INFO L93 Difference]: Finished difference Result 19539 states and 30500 transitions. [2021-11-19 13:41:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:41:19,538 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 [2021-11-19 13:41:19,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:41:19,577 INFO L225 Difference]: With dead ends: 19539 [2021-11-19 13:41:19,577 INFO L226 Difference]: Without dead ends: 9789 [2021-11-19 13:41:19,606 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 [2021-11-19 13:41:19,607 INFO L933 BasicCegarLoop]: 3144 mSDtfsCounter, 0 mSDsluCounter, 3137 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6281 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:41:19,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6281 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:41:19,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9789 states. [2021-11-19 13:41:20,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9789 to 9783. [2021-11-19 13:41:20,400 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) [2021-11-19 13:41:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9783 states to 9783 states and 15248 transitions. [2021-11-19 13:41:20,443 INFO L78 Accepts]: Start accepts. Automaton has 9783 states and 15248 transitions. Word has length 297 [2021-11-19 13:41:20,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:41:20,444 INFO L470 AbstractCegarLoop]: Abstraction has 9783 states and 15248 transitions. [2021-11-19 13:41:20,445 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) [2021-11-19 13:41:20,445 INFO L276 IsEmpty]: Start isEmpty. Operand 9783 states and 15248 transitions. [2021-11-19 13:41:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-19 13:41:20,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:41:20,474 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] [2021-11-19 13:41:20,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:41:20,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:41:20,689 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:41:20,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:41:20,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1932997356, now seen corresponding path program 1 times [2021-11-19 13:41:20,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:41:20,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858557870] [2021-11-19 13:41:20,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:20,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:41:20,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:41:20,694 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:41:20,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:41:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:41:22,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1963 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:41:22,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 13:41:23,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 13:41:24,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:41:24,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858557870] [2021-11-19 13:41:24,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858557870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:41:24,808 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:41:24,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:41:24,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247253806] [2021-11-19 13:41:24,808 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:41:24,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:41:24,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:41:24,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:41:24,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:41:24,810 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) [2021-11-19 13:41:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:41:25,570 INFO L93 Difference]: Finished difference Result 19551 states and 30488 transitions. [2021-11-19 13:41:25,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:41:25,581 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 [2021-11-19 13:41:25,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:41:25,609 INFO L225 Difference]: With dead ends: 19551 [2021-11-19 13:41:25,609 INFO L226 Difference]: Without dead ends: 9801 [2021-11-19 13:41:25,628 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 [2021-11-19 13:41:25,629 INFO L933 BasicCegarLoop]: 3144 mSDtfsCounter, 3 mSDsluCounter, 3141 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6285 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:41:25,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6285 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:41:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9801 states. [2021-11-19 13:41:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9801 to 9801. [2021-11-19 13:41:26,239 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) [2021-11-19 13:41:26,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9801 states to 9801 states and 15266 transitions. [2021-11-19 13:41:26,283 INFO L78 Accepts]: Start accepts. Automaton has 9801 states and 15266 transitions. Word has length 299 [2021-11-19 13:41:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:41:26,284 INFO L470 AbstractCegarLoop]: Abstraction has 9801 states and 15266 transitions. [2021-11-19 13:41:26,284 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) [2021-11-19 13:41:26,284 INFO L276 IsEmpty]: Start isEmpty. Operand 9801 states and 15266 transitions. [2021-11-19 13:41:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-19 13:41:26,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:41:26,302 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] [2021-11-19 13:41:26,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-19 13:41:26,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:41:26,529 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:41:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:41:26,530 INFO L85 PathProgramCache]: Analyzing trace with hash 85756321, now seen corresponding path program 1 times [2021-11-19 13:41:26,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:41:26,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011273992] [2021-11-19 13:41:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:26,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:41:26,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:41:26,533 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:41:26,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:41:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:41:28,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 1842 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:41:28,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 13:41:29,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-19 13:41:30,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:41:30,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011273992] [2021-11-19 13:41:30,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011273992] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:41:30,561 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:41:30,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 13:41:30,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727413150] [2021-11-19 13:41:30,561 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:41:30,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:41:30,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:41:30,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:41:30,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:41:30,563 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) [2021-11-19 13:41:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:41:32,327 INFO L93 Difference]: Finished difference Result 19735 states and 30746 transitions. [2021-11-19 13:41:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 13:41:32,328 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 [2021-11-19 13:41:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:41:32,362 INFO L225 Difference]: With dead ends: 19735 [2021-11-19 13:41:32,362 INFO L226 Difference]: Without dead ends: 9880 [2021-11-19 13:41:32,389 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 [2021-11-19 13:41:32,390 INFO L933 BasicCegarLoop]: 3218 mSDtfsCounter, 233 mSDsluCounter, 9431 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 12649 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:41:32,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 12649 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:41:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9880 states. [2021-11-19 13:41:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9880 to 9741. [2021-11-19 13:41:33,036 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) [2021-11-19 13:41:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9741 states to 9741 states and 15156 transitions. [2021-11-19 13:41:33,096 INFO L78 Accepts]: Start accepts. Automaton has 9741 states and 15156 transitions. Word has length 289 [2021-11-19 13:41:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:41:33,097 INFO L470 AbstractCegarLoop]: Abstraction has 9741 states and 15156 transitions. [2021-11-19 13:41:33,098 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) [2021-11-19 13:41:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 9741 states and 15156 transitions. [2021-11-19 13:41:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-19 13:41:33,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:41:33,215 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] [2021-11-19 13:41:33,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:41:33,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:41:33,441 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:41:33,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:41:33,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1703576628, now seen corresponding path program 1 times [2021-11-19 13:41:33,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:41:33,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802811818] [2021-11-19 13:41:33,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:33,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:41:33,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:41:33,446 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:41:33,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:41:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:41:35,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 1977 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:41:35,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 13:41:37,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 13:41:38,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:41:38,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802811818] [2021-11-19 13:41:38,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802811818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:41:38,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [397539937] [2021-11-19 13:41:38,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:38,190 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:41:38,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:41:38,192 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:41:38,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-19 13:41:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:41:39,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 1977 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:41:39,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-19 13:41:41,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 13:41:43,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [397539937] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:41:43,252 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:41:43,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [5, 5] total 14 [2021-11-19 13:41:43,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897598824] [2021-11-19 13:41:43,254 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:41:43,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:41:43,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:41:43,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:41:43,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:41:43,259 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) [2021-11-19 13:41:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:41:44,695 INFO L93 Difference]: Finished difference Result 19557 states and 30862 transitions. [2021-11-19 13:41:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:41:44,699 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 [2021-11-19 13:41:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:41:44,769 INFO L225 Difference]: With dead ends: 19557 [2021-11-19 13:41:44,769 INFO L226 Difference]: Without dead ends: 9849 [2021-11-19 13:41:44,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1208 GetRequests, 1196 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:41:44,804 INFO L933 BasicCegarLoop]: 3158 mSDtfsCounter, 107 mSDsluCounter, 15673 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 18831 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:41:44,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 18831 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:41:44,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9849 states. [2021-11-19 13:41:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9849 to 9839. [2021-11-19 13:41:45,679 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) [2021-11-19 13:41:45,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9839 states to 9839 states and 15302 transitions. [2021-11-19 13:41:45,723 INFO L78 Accepts]: Start accepts. Automaton has 9839 states and 15302 transitions. Word has length 303 [2021-11-19 13:41:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:41:45,724 INFO L470 AbstractCegarLoop]: Abstraction has 9839 states and 15302 transitions. [2021-11-19 13:41:45,725 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) [2021-11-19 13:41:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 9839 states and 15302 transitions. [2021-11-19 13:41:45,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-19 13:41:45,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:41:45,747 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] [2021-11-19 13:41:45,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:41:46,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-19 13:41:46,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:41:46,167 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:41:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:41:46,167 INFO L85 PathProgramCache]: Analyzing trace with hash 820067638, now seen corresponding path program 1 times [2021-11-19 13:41:46,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:41:46,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784253027] [2021-11-19 13:41:46,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:46,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:41:46,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:41:46,171 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:41:46,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:41:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:41:48,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 1972 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:41:48,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 13:41:49,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 13:41:50,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:41:50,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784253027] [2021-11-19 13:41:50,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784253027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:41:50,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [494152127] [2021-11-19 13:41:50,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:50,748 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:41:50,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:41:50,759 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:41:50,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-19 13:41:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:41:52,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 1972 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:41:52,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-19 13:41:53,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 13:41:54,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [494152127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:41:54,682 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:41:54,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-19 13:41:54,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617673614] [2021-11-19 13:41:54,683 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:41:54,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:41:54,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:41:54,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:41:54,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:41:54,685 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) [2021-11-19 13:41:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:41:57,673 INFO L93 Difference]: Finished difference Result 19257 states and 30222 transitions. [2021-11-19 13:41:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:41:57,674 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 [2021-11-19 13:41:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:41:57,779 INFO L225 Difference]: With dead ends: 19257 [2021-11-19 13:41:57,779 INFO L226 Difference]: Without dead ends: 18357 [2021-11-19 13:41:57,801 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 [2021-11-19 13:41:57,802 INFO L933 BasicCegarLoop]: 5053 mSDtfsCounter, 2485 mSDsluCounter, 29934 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2592 SdHoareTripleChecker+Valid, 34987 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:41:57,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2592 Valid, 34987 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 13:41:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18357 states. [2021-11-19 13:41:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18357 to 9691. [2021-11-19 13:41:58,570 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) [2021-11-19 13:41:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9691 states to 9691 states and 15057 transitions. [2021-11-19 13:41:58,614 INFO L78 Accepts]: Start accepts. Automaton has 9691 states and 15057 transitions. Word has length 303 [2021-11-19 13:41:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:41:58,615 INFO L470 AbstractCegarLoop]: Abstraction has 9691 states and 15057 transitions. [2021-11-19 13:41:58,615 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) [2021-11-19 13:41:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 9691 states and 15057 transitions. [2021-11-19 13:41:58,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-19 13:41:58,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:41:58,636 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] [2021-11-19 13:41:58,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-19 13:41:58,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 13:41:59,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:41:59,049 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:41:59,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:41:59,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1490675135, now seen corresponding path program 1 times [2021-11-19 13:41:59,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:41:59,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130627060] [2021-11-19 13:41:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:41:59,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:41:59,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:41:59,053 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:41:59,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 13:42:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:01,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 2001 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:42:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:42:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 13:42:02,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:42:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 13:42:03,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:42:03,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130627060] [2021-11-19 13:42:03,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130627060] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:42:03,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2110649936] [2021-11-19 13:42:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:03,813 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:42:03,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:42:03,814 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:42:03,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-19 13:42:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:05,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 2001 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:42:05,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:42:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-19 13:42:06,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:42:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 13:42:07,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2110649936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:42:07,457 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:42:07,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-19 13:42:07,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145600163] [2021-11-19 13:42:07,458 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:42:07,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:42:07,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:42:07,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:42:07,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:42:07,460 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) [2021-11-19 13:42:09,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:42:09,444 INFO L93 Difference]: Finished difference Result 19278 states and 30151 transitions. [2021-11-19 13:42:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:42:09,445 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 [2021-11-19 13:42:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:42:09,522 INFO L225 Difference]: With dead ends: 19278 [2021-11-19 13:42:09,523 INFO L226 Difference]: Without dead ends: 16657 [2021-11-19 13:42:09,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1234 GetRequests, 1223 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:42:09,549 INFO L933 BasicCegarLoop]: 4540 mSDtfsCounter, 2503 mSDsluCounter, 15263 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2503 SdHoareTripleChecker+Valid, 19803 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:42:09,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2503 Valid, 19803 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:42:09,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16657 states. [2021-11-19 13:42:10,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16657 to 9682. [2021-11-19 13:42:10,428 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) [2021-11-19 13:42:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9682 states to 9682 states and 15039 transitions. [2021-11-19 13:42:10,471 INFO L78 Accepts]: Start accepts. Automaton has 9682 states and 15039 transitions. Word has length 309 [2021-11-19 13:42:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:42:10,472 INFO L470 AbstractCegarLoop]: Abstraction has 9682 states and 15039 transitions. [2021-11-19 13:42:10,472 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) [2021-11-19 13:42:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 9682 states and 15039 transitions. [2021-11-19 13:42:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-19 13:42:10,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:42:10,497 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] [2021-11-19 13:42:10,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 13:42:10,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-19 13:42:10,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:42:10,913 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:42:10,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:42:10,914 INFO L85 PathProgramCache]: Analyzing trace with hash 35889146, now seen corresponding path program 1 times [2021-11-19 13:42:10,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:42:10,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480859192] [2021-11-19 13:42:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:10,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:42:10,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:42:10,918 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:42:10,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 13:42:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:13,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 2002 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:42:13,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:42:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 13:42:14,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:42:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 13:42:15,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:42:15,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480859192] [2021-11-19 13:42:15,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480859192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:42:15,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [70197454] [2021-11-19 13:42:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:15,480 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:42:15,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:42:15,488 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:42:15,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-19 13:42:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:16,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 2002 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:42:17,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:42:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-19 13:42:18,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:42:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-19 13:42:19,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [70197454] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:42:19,684 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:42:19,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-19 13:42:19,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205762132] [2021-11-19 13:42:19,685 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:42:19,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:42:19,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:42:19,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:42:19,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:42:19,687 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) [2021-11-19 13:42:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:42:22,572 INFO L93 Difference]: Finished difference Result 15437 states and 24216 transitions. [2021-11-19 13:42:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:42:22,580 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 [2021-11-19 13:42:22,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:42:22,647 INFO L225 Difference]: With dead ends: 15437 [2021-11-19 13:42:22,648 INFO L226 Difference]: Without dead ends: 14425 [2021-11-19 13:42:22,666 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 [2021-11-19 13:42:22,667 INFO L933 BasicCegarLoop]: 4935 mSDtfsCounter, 3048 mSDsluCounter, 30990 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3155 SdHoareTripleChecker+Valid, 35925 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:42:22,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3155 Valid, 35925 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 13:42:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14425 states. [2021-11-19 13:42:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14425 to 9304. [2021-11-19 13:42:23,537 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) [2021-11-19 13:42:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9304 states to 9304 states and 14461 transitions. [2021-11-19 13:42:23,582 INFO L78 Accepts]: Start accepts. Automaton has 9304 states and 14461 transitions. Word has length 312 [2021-11-19 13:42:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:42:23,583 INFO L470 AbstractCegarLoop]: Abstraction has 9304 states and 14461 transitions. [2021-11-19 13:42:23,583 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) [2021-11-19 13:42:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 9304 states and 14461 transitions. [2021-11-19 13:42:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-11-19 13:42:23,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:42:23,597 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] [2021-11-19 13:42:23,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 13:42:23,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-19 13:42:23,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:42:23,998 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:42:23,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:42:23,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1170871613, now seen corresponding path program 1 times [2021-11-19 13:42:24,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:42:24,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381873566] [2021-11-19 13:42:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:24,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:42:24,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:42:24,002 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:42:24,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 13:42:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:26,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 2014 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:42:26,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:42:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 35 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 13:42:27,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:42:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 13:42:28,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:42:28,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381873566] [2021-11-19 13:42:28,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381873566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:42:28,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1104799825] [2021-11-19 13:42:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:28,604 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:42:28,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:42:28,605 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:42:28,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 13:42:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:30,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 2014 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:42:30,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:42:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-19 13:42:31,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:42:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-19 13:42:32,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1104799825] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:42:32,194 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:42:32,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-19 13:42:32,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44537563] [2021-11-19 13:42:32,195 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:42:32,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:42:32,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:42:32,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:42:32,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:42:32,196 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) [2021-11-19 13:42:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:42:33,773 INFO L93 Difference]: Finished difference Result 15148 states and 23778 transitions. [2021-11-19 13:42:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:42:33,774 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 [2021-11-19 13:42:33,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:42:33,778 INFO L225 Difference]: With dead ends: 15148 [2021-11-19 13:42:33,778 INFO L226 Difference]: Without dead ends: 0 [2021-11-19 13:42:33,819 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 [2021-11-19 13:42:33,820 INFO L933 BasicCegarLoop]: 4342 mSDtfsCounter, 2412 mSDsluCounter, 14609 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2413 SdHoareTripleChecker+Valid, 18951 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:42:33,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2413 Valid, 18951 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:42:33,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-19 13:42:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-19 13:42:33,822 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) [2021-11-19 13:42:33,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-19 13:42:33,824 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 315 [2021-11-19 13:42:33,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:42:33,825 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 13:42:33,825 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) [2021-11-19 13:42:33,826 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-19 13:42:33,826 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-19 13:42:33,829 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 13:42:33,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 13:42:34,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-19 13:42:34,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8df4398-a3cf-45c5-a29b-7730d2c960c4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:42:34,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.