./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.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_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/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_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/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_ad651045-8c98-47d7-a214-66defa861e35/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 f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:45:03,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:45:03,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:45:03,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:45:03,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:45:03,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:45:03,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:45:03,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:45:03,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:45:03,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:45:03,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:45:03,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:45:03,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:45:03,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:45:03,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:45:03,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:45:03,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:45:03,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:45:03,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:45:03,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:45:03,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:45:03,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:45:03,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:45:03,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:45:03,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:45:03,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:45:03,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:45:03,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:45:03,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:45:03,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:45:03,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:45:03,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:45:03,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:45:03,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:45:03,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:45:03,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:45:03,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:45:03,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:45:03,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:45:03,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:45:03,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:45:03,500 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:45:03,534 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:45:03,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:45:03,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:45:03,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:45:03,535 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:45:03,536 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:45:03,536 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:45:03,536 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:45:03,536 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:45:03,536 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:45:03,536 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:45:03,537 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:45:03,537 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:45:03,537 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:45:03,538 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:45:03,538 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:45:03,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:45:03,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:45:03,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:45:03,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:45:03,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:45:03,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:45:03,540 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:45:03,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:45:03,541 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:45:03,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:45:03,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:45:03,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:45:03,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:45:03,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:45:03,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:45:03,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:45:03,544 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:45:03,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:45:03,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:45:03,544 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:45:03,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:45:03,545 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_ad651045-8c98-47d7-a214-66defa861e35/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 [2021-11-19 14:45:03,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:45:03,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:45:03,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:45:03,852 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:45:03,853 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:45:03,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-19 14:45:03,928 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/data/ae3b0efab/54e818f4a9f04c26b4d619f1c91b2485/FLAG64ae24dc3 [2021-11-19 14:45:05,050 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:45:05,051 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-19 14:45:05,109 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/data/ae3b0efab/54e818f4a9f04c26b4d619f1c91b2485/FLAG64ae24dc3 [2021-11-19 14:45:05,357 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/data/ae3b0efab/54e818f4a9f04c26b4d619f1c91b2485 [2021-11-19 14:45:05,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:45:05,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:45:05,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:45:05,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:45:05,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:45:05,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:45:05" (1/1) ... [2021-11-19 14:45:05,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2925b456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:05, skipping insertion in model container [2021-11-19 14:45:05,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:45:05" (1/1) ... [2021-11-19 14:45:05,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:45:05,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:45:07,319 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_ad651045-8c98-47d7-a214-66defa861e35/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-19 14:45:07,371 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:45:07,406 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 14:45:07,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1cbe863d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:07, skipping insertion in model container [2021-11-19 14:45:07,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:45:07,408 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:45:07,410 INFO L158 Benchmark]: Toolchain (without parser) took 2047.45ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 63.2MB in the beginning and 78.6MB in the end (delta: -15.4MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. [2021-11-19 14:45:07,411 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 104.9MB. Free memory was 60.8MB in the beginning and 60.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:45:07,413 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2044.70ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 62.9MB in the beginning and 78.6MB in the end (delta: -15.7MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. [2021-11-19 14:45:07,415 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 104.9MB. Free memory was 60.8MB in the beginning and 60.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2044.70ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 62.9MB in the beginning and 78.6MB in the end (delta: -15.7MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5209]: 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_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/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_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/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_ad651045-8c98-47d7-a214-66defa861e35/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 f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:45:10,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:45:10,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:45:10,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:45:10,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:45:10,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:45:10,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:45:10,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:45:10,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:45:10,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:45:10,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:45:10,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:45:10,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:45:10,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:45:10,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:45:10,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:45:10,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:45:10,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:45:10,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:45:10,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:45:10,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:45:10,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:45:10,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:45:10,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:45:10,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:45:10,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:45:10,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:45:10,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:45:10,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:45:10,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:45:10,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:45:10,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:45:10,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:45:10,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:45:10,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:45:10,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:45:10,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:45:10,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:45:10,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:45:10,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:45:10,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:45:10,340 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:45:10,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:45:10,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:45:10,397 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:45:10,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:45:10,397 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:45:10,397 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:45:10,398 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:45:10,398 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:45:10,399 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:45:10,400 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:45:10,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:45:10,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:45:10,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:45:10,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:45:10,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:45:10,404 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:45:10,404 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:45:10,404 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:45:10,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:45:10,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:45:10,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:45:10,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:45:10,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:45:10,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:45:10,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:45:10,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:45:10,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:45:10,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:45:10,407 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:45:10,407 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:45:10,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:45:10,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:45:10,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:45:10,408 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_ad651045-8c98-47d7-a214-66defa861e35/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 [2021-11-19 14:45:10,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:45:10,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:45:10,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:45:10,939 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:45:10,940 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:45:10,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-19 14:45:11,020 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/data/749fc5e10/c8a0847a58124bf4a94ff16c4373ca3d/FLAG63a64ff58 [2021-11-19 14:45:12,224 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:45:12,224 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-19 14:45:12,275 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/data/749fc5e10/c8a0847a58124bf4a94ff16c4373ca3d/FLAG63a64ff58 [2021-11-19 14:45:12,530 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/data/749fc5e10/c8a0847a58124bf4a94ff16c4373ca3d [2021-11-19 14:45:12,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:45:12,535 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:45:12,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:45:12,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:45:12,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:45:12,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:45:12" (1/1) ... [2021-11-19 14:45:12,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26ce222d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:12, skipping insertion in model container [2021-11-19 14:45:12,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:45:12" (1/1) ... [2021-11-19 14:45:12,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:45:12,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:45:14,505 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_ad651045-8c98-47d7-a214-66defa861e35/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-19 14:45:14,561 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:45:14,618 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:45:14,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:45:15,074 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_ad651045-8c98-47d7-a214-66defa861e35/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-19 14:45:15,083 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:45:15,120 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:45:15,617 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_ad651045-8c98-47d7-a214-66defa861e35/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-19 14:45:15,626 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:45:16,074 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:45:16,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:16 WrapperNode [2021-11-19 14:45:16,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:45:16,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:45:16,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:45:16,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:45:16,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:16" (1/1) ... [2021-11-19 14:45:16,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:16" (1/1) ... [2021-11-19 14:45:16,414 INFO L137 Inliner]: procedures = 214, calls = 1489, calls flagged for inlining = 98, calls inlined = 84, statements flattened = 3225 [2021-11-19 14:45:16,414 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:45:16,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:45:16,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:45:16,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:45:16,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:16" (1/1) ... [2021-11-19 14:45:16,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:16" (1/1) ... [2021-11-19 14:45:16,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:16" (1/1) ... [2021-11-19 14:45:16,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:16" (1/1) ... [2021-11-19 14:45:16,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:16" (1/1) ... [2021-11-19 14:45:16,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:16" (1/1) ... [2021-11-19 14:45:16,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:16" (1/1) ... [2021-11-19 14:45:16,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:45:16,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:45:16,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:45:16,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:45:16,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:16" (1/1) ... [2021-11-19 14:45:16,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:45:16,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:45:16,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:45:16,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:45:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:45:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:45:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:45:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 14:45:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 14:45:16,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 14:45:16,757 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-19 14:45:16,757 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-19 14:45:16,757 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-19 14:45:16,758 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-19 14:45:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-19 14:45:16,758 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-19 14:45:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 14:45:16,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 14:45:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-19 14:45:16,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-19 14:45:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-19 14:45:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-19 14:45:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-19 14:45:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-19 14:45:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-19 14:45:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-19 14:45:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-19 14:45:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-19 14:45:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toio [2021-11-19 14:45:16,760 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toio [2021-11-19 14:45:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-19 14:45:16,760 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-19 14:45:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-19 14:45:16,760 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-19 14:45:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-19 14:45:16,760 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-19 14:45:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:45:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:45:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2021-11-19 14:45:16,762 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2021-11-19 14:45:16,762 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap [2021-11-19 14:45:16,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap [2021-11-19 14:45:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-19 14:45:16,763 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-19 14:45:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:45:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 14:45:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 14:45:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2021-11-19 14:45:16,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2021-11-19 14:45:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:45:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:45:16,765 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-19 14:45:16,765 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-19 14:45:16,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:45:16,765 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-19 14:45:16,767 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-19 14:45:16,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:45:16,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:45:16,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 14:45:16,769 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-19 14:45:16,769 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-19 14:45:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-19 14:45:16,770 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-19 14:45:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-19 14:45:16,771 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-19 14:45:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_type_trans [2021-11-19 14:45:16,772 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_type_trans [2021-11-19 14:45:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-19 14:45:16,772 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-19 14:45:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-19 14:45:16,772 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-19 14:45:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure farsync_type_trans [2021-11-19 14:45:16,773 INFO L138 BoogieDeclarations]: Found implementation of procedure farsync_type_trans [2021-11-19 14:45:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-19 14:45:16,774 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-19 14:45:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-19 14:45:16,774 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-19 14:45:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-19 14:45:16,775 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-19 14:45:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-19 14:45:16,775 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-19 14:45:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2021-11-19 14:45:16,776 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2021-11-19 14:45:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 14:45:16,776 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 14:45:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure fst_issue_cmd [2021-11-19 14:45:16,776 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_issue_cmd [2021-11-19 14:45:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 14:45:16,777 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 14:45:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-19 14:45:16,778 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-19 14:45:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-19 14:45:16,778 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-19 14:45:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure fst_disable_intr [2021-11-19 14:45:16,780 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_disable_intr [2021-11-19 14:45:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 14:45:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 14:45:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 14:45:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 14:45:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:45:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-19 14:45:16,783 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-19 14:45:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:45:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure fst_cpureset [2021-11-19 14:45:16,783 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_cpureset [2021-11-19 14:45:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:45:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 14:45:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 14:45:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 14:45:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-11-19 14:45:16,785 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-11-19 14:45:16,785 INFO L130 BoogieDeclarations]: Found specification of procedure fst_process_rx_status [2021-11-19 14:45:16,785 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_process_rx_status [2021-11-19 14:45:16,785 INFO L130 BoogieDeclarations]: Found specification of procedure fst_q_work_item [2021-11-19 14:45:16,785 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_q_work_item [2021-11-19 14:45:16,786 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-19 14:45:16,787 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-19 14:45:16,790 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-19 14:45:16,791 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-19 14:45:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-19 14:45:16,791 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-19 14:45:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_ioctl [2021-11-19 14:45:16,793 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_ioctl [2021-11-19 14:45:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-19 14:45:16,794 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-19 14:45:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-19 14:45:16,799 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-19 14:45:16,799 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-19 14:45:16,799 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-19 14:45:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-19 14:45:16,800 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-19 14:45:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure fst_clear_intr [2021-11-19 14:45:16,800 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_clear_intr [2021-11-19 14:45:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 14:45:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2021-11-19 14:45:16,801 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2021-11-19 14:45:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2021-11-19 14:45:16,801 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2021-11-19 14:45:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2021-11-19 14:45:16,801 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2021-11-19 14:45:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-19 14:45:16,802 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-19 14:45:16,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:45:16,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:45:16,802 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-19 14:45:16,802 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-19 14:45:17,721 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:45:17,725 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:45:24,612 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 14:45:24,620 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 14:45:24,631 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 14:45:24,632 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 14:45:24,635 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 14:45:24,636 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 14:45:24,649 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 14:45:46,527 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##258: assume false; [2021-11-19 14:45:46,528 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##259: assume !false; [2021-11-19 14:45:46,528 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##265: assume !false; [2021-11-19 14:45:46,528 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##264: assume false; [2021-11-19 14:45:46,528 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##214: assume !false; [2021-11-19 14:45:46,529 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##213: assume false; [2021-11-19 14:45:46,529 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##228: assume !false; [2021-11-19 14:45:46,529 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##227: assume false; [2021-11-19 14:45:46,529 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##92: assume !false;call ULTIMATE.dealloc(fst_ioctl_~#wrthdr~0#1.base, fst_ioctl_~#wrthdr~0#1.offset);havoc fst_ioctl_~#wrthdr~0#1.base, fst_ioctl_~#wrthdr~0#1.offset;call ULTIMATE.dealloc(fst_ioctl_~#info~0#1.base, fst_ioctl_~#info~0#1.offset);havoc fst_ioctl_~#info~0#1.base, fst_ioctl_~#info~0#1.offset; [2021-11-19 14:45:46,530 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume false; [2021-11-19 14:45:46,530 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2021-11-19 14:45:46,530 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2021-11-19 14:45:46,530 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##391: assume !false; [2021-11-19 14:45:46,530 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##390: assume false; [2021-11-19 14:45:46,589 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:45:46,616 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:45:46,616 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:45:46,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:45:46 BoogieIcfgContainer [2021-11-19 14:45:46,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:45:46,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:45:46,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:45:46,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:45:46,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:45:12" (1/3) ... [2021-11-19 14:45:46,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@85625f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:45:46, skipping insertion in model container [2021-11-19 14:45:46,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:16" (2/3) ... [2021-11-19 14:45:46,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@85625f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:45:46, skipping insertion in model container [2021-11-19 14:45:46,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:45:46" (3/3) ... [2021-11-19 14:45:46,631 INFO L111 eAbstractionObserver]: Analyzing ICFG module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-19 14:45:46,638 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:45:46,638 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:45:46,710 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:45:46,718 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 14:45:46,718 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:45:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 1064 states, 746 states have (on average 1.2908847184986596) internal successors, (963), 754 states have internal predecessors, (963), 260 states have call successors, (260), 56 states have call predecessors, (260), 56 states have return successors, (260), 260 states have call predecessors, (260), 260 states have call successors, (260) [2021-11-19 14:45:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 14:45:46,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:45:46,780 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 14:45:46,781 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:45:46,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:45:46,788 INFO L85 PathProgramCache]: Analyzing trace with hash 953068106, now seen corresponding path program 1 times [2021-11-19 14:45:46,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:45:46,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145932153] [2021-11-19 14:45:46,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:45:46,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:45:46,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:45:46,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:45:46,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:45:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:45:47,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:45:47,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:45:48,071 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 14:45:48,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:45:48,189 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 14:45:48,190 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:45:48,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145932153] [2021-11-19 14:45:48,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145932153] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:45:48,191 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:45:48,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:45:48,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811998634] [2021-11-19 14:45:48,194 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:45:48,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:45:48,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:45:48,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:45:48,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:45:48,239 INFO L87 Difference]: Start difference. First operand has 1064 states, 746 states have (on average 1.2908847184986596) internal successors, (963), 754 states have internal predecessors, (963), 260 states have call successors, (260), 56 states have call predecessors, (260), 56 states have return successors, (260), 260 states have call predecessors, (260), 260 states have call successors, (260) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:45:48,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:45:48,602 INFO L93 Difference]: Finished difference Result 2124 states and 2973 transitions. [2021-11-19 14:45:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:45:48,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2021-11-19 14:45:48,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:45:48,659 INFO L225 Difference]: With dead ends: 2124 [2021-11-19 14:45:48,659 INFO L226 Difference]: Without dead ends: 1061 [2021-11-19 14:45:48,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:45:48,678 INFO L933 BasicCegarLoop]: 1475 mSDtfsCounter, 2 mSDsluCounter, 2946 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4421 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:45:48,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4421 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:45:48,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-11-19 14:45:48,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 1061. [2021-11-19 14:45:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 745 states have (on average 1.2859060402684563) internal successors, (958), 751 states have internal predecessors, (958), 260 states have call successors, (260), 56 states have call predecessors, (260), 55 states have return successors, (258), 258 states have call predecessors, (258), 258 states have call successors, (258) [2021-11-19 14:45:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1476 transitions. [2021-11-19 14:45:48,944 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1476 transitions. Word has length 21 [2021-11-19 14:45:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:45:48,944 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1476 transitions. [2021-11-19 14:45:48,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:45:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1476 transitions. [2021-11-19 14:45:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 14:45:48,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:45:48,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:45:48,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 14:45:49,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:45:49,172 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:45:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:45:49,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1523179650, now seen corresponding path program 1 times [2021-11-19 14:45:49,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:45:49,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812317915] [2021-11-19 14:45:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:45:49,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:45:49,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:45:49,183 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:45:49,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:45:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:45:50,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:45:50,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:45:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:45:50,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:45:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:45:50,808 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:45:50,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812317915] [2021-11-19 14:45:50,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812317915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:45:50,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1897533858] [2021-11-19 14:45:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:45:50,810 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:45:50,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:45:50,817 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:45:50,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-19 14:45:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:45:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:45:51,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:45:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:45:51,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:45:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:45:52,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1897533858] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:45:52,038 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:45:52,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [5, 5] total 9 [2021-11-19 14:45:52,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446218244] [2021-11-19 14:45:52,040 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:45:52,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:45:52,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:45:52,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:45:52,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:45:52,042 INFO L87 Difference]: Start difference. First operand 1061 states and 1476 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:45:52,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:45:52,247 INFO L93 Difference]: Finished difference Result 3151 states and 4390 transitions. [2021-11-19 14:45:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:45:52,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2021-11-19 14:45:52,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:45:52,271 INFO L225 Difference]: With dead ends: 3151 [2021-11-19 14:45:52,271 INFO L226 Difference]: Without dead ends: 2100 [2021-11-19 14:45:52,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:45:52,280 INFO L933 BasicCegarLoop]: 1973 mSDtfsCounter, 1448 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 3425 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:45:52,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1448 Valid, 3425 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:45:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-11-19 14:45:52,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2097. [2021-11-19 14:45:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 1470 states have (on average 1.2843537414965986) internal successors, (1888), 1481 states have internal predecessors, (1888), 516 states have call successors, (516), 111 states have call predecessors, (516), 110 states have return successors, (514), 514 states have call predecessors, (514), 514 states have call successors, (514) [2021-11-19 14:45:52,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 2918 transitions. [2021-11-19 14:45:52,469 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 2918 transitions. Word has length 25 [2021-11-19 14:45:52,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:45:52,470 INFO L470 AbstractCegarLoop]: Abstraction has 2097 states and 2918 transitions. [2021-11-19 14:45:52,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:45:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 2918 transitions. [2021-11-19 14:45:52,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 14:45:52,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:45:52,475 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:45:52,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:45:52,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-19 14:45:52,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:45:52,893 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:45:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:45:52,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1125436765, now seen corresponding path program 1 times [2021-11-19 14:45:52,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:45:52,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279930539] [2021-11-19 14:45:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:45:52,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:45:52,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:45:52,899 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:45:52,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:45:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:45:53,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:45:54,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:45:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:45:54,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:45:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:45:54,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:45:54,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279930539] [2021-11-19 14:45:54,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279930539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:45:54,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [995141938] [2021-11-19 14:45:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:45:54,532 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:45:54,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:45:54,533 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:45:54,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-19 14:45:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:45:55,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:45:55,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:45:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:45:55,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:45:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:45:55,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [995141938] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:45:55,718 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:45:55,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-19 14:45:55,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535965391] [2021-11-19 14:45:55,719 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:45:55,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:45:55,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:45:55,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:45:55,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:45:55,720 INFO L87 Difference]: Start difference. First operand 2097 states and 2918 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:45:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:45:57,157 INFO L93 Difference]: Finished difference Result 6061 states and 8722 transitions. [2021-11-19 14:45:57,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:45:57,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-19 14:45:57,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:45:57,198 INFO L225 Difference]: With dead ends: 6061 [2021-11-19 14:45:57,199 INFO L226 Difference]: Without dead ends: 3979 [2021-11-19 14:45:57,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:45:57,218 INFO L933 BasicCegarLoop]: 2636 mSDtfsCounter, 2190 mSDsluCounter, 6381 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 9017 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:45:57,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2383 Valid, 9017 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:45:57,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2021-11-19 14:45:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 2031. [2021-11-19 14:45:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1429 states have (on average 1.28481455563331) internal successors, (1836), 1439 states have internal predecessors, (1836), 491 states have call successors, (491), 111 states have call predecessors, (491), 110 states have return successors, (489), 489 states have call predecessors, (489), 489 states have call successors, (489) [2021-11-19 14:45:57,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2816 transitions. [2021-11-19 14:45:57,505 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2816 transitions. Word has length 45 [2021-11-19 14:45:57,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:45:57,506 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 2816 transitions. [2021-11-19 14:45:57,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:45:57,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2816 transitions. [2021-11-19 14:45:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 14:45:57,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:45:57,521 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:45:57,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:45:57,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:45:57,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:45:57,939 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:45:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:45:57,940 INFO L85 PathProgramCache]: Analyzing trace with hash -8820867, now seen corresponding path program 1 times [2021-11-19 14:45:57,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:45:57,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528886237] [2021-11-19 14:45:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:45:57,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:45:57,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:45:57,944 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:45:57,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:45:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:45:59,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:45:59,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:45:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:45:59,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:45:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:45:59,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:45:59,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528886237] [2021-11-19 14:45:59,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528886237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:45:59,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1265736641] [2021-11-19 14:45:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:45:59,681 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:45:59,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:45:59,686 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:45:59,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 14:46:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:01,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:46:01,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:01,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:01,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1265736641] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:01,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634588503] [2021-11-19 14:46:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:01,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:46:01,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:46:01,900 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:46:01,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 14:46:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:46:02,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:46:03,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:46:03,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634588503] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:03,732 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 14:46:03,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-19 14:46:03,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602617975] [2021-11-19 14:46:03,733 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:03,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:46:03,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:03,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:46:03,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:46:03,735 INFO L87 Difference]: Start difference. First operand 2031 states and 2816 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:46:05,819 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:46:22,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:22,477 INFO L93 Difference]: Finished difference Result 8172 states and 11361 transitions. [2021-11-19 14:46:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:46:22,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-11-19 14:46:22,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:22,530 INFO L225 Difference]: With dead ends: 8172 [2021-11-19 14:46:22,531 INFO L226 Difference]: Without dead ends: 7118 [2021-11-19 14:46:22,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:46:22,539 INFO L933 BasicCegarLoop]: 3820 mSDtfsCounter, 8110 mSDsluCounter, 4885 mSDsCounter, 0 mSdLazyCounter, 3367 mSolverCounterSat, 1455 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8110 SdHoareTripleChecker+Valid, 8705 SdHoareTripleChecker+Invalid, 4823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1455 IncrementalHoareTripleChecker+Valid, 3367 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:22,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8110 Valid, 8705 Invalid, 4823 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1455 Valid, 3367 Invalid, 1 Unknown, 0 Unchecked, 18.1s Time] [2021-11-19 14:46:22,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7118 states. [2021-11-19 14:46:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7118 to 7082. [2021-11-19 14:46:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7082 states, 4975 states have (on average 1.2876381909547738) internal successors, (6406), 5006 states have internal predecessors, (6406), 1721 states have call successors, (1721), 386 states have call predecessors, (1721), 385 states have return successors, (1727), 1721 states have call predecessors, (1727), 1719 states have call successors, (1727) [2021-11-19 14:46:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7082 states to 7082 states and 9854 transitions. [2021-11-19 14:46:22,919 INFO L78 Accepts]: Start accepts. Automaton has 7082 states and 9854 transitions. Word has length 47 [2021-11-19 14:46:22,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:22,919 INFO L470 AbstractCegarLoop]: Abstraction has 7082 states and 9854 transitions. [2021-11-19 14:46:22,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:46:22,920 INFO L276 IsEmpty]: Start isEmpty. Operand 7082 states and 9854 transitions. [2021-11-19 14:46:22,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 14:46:22,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:22,922 INFO L514 BasicCegarLoop]: trace histogram [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 14:46:22,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:23,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:23,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:23,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:46:23,547 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:23,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:23,548 INFO L85 PathProgramCache]: Analyzing trace with hash -264140622, now seen corresponding path program 1 times [2021-11-19 14:46:23,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:23,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071641974] [2021-11-19 14:46:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:23,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:23,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:23,551 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:23,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:46:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:24,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:46:24,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:24,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:24,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:24,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071641974] [2021-11-19 14:46:24,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071641974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:24,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [736307584] [2021-11-19 14:46:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:24,797 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:24,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:46:24,804 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:46:24,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 14:46:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:25,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:46:25,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:46:25,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:46:25,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [736307584] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:25,825 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:46:25,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-19 14:46:25,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593900472] [2021-11-19 14:46:25,826 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:25,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:46:25,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:25,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:46:25,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:46:25,827 INFO L87 Difference]: Start difference. First operand 7082 states and 9854 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:46:27,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:27,389 INFO L93 Difference]: Finished difference Result 17071 states and 24365 transitions. [2021-11-19 14:46:27,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:46:27,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2021-11-19 14:46:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:27,492 INFO L225 Difference]: With dead ends: 17071 [2021-11-19 14:46:27,493 INFO L226 Difference]: Without dead ends: 10970 [2021-11-19 14:46:27,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:46:27,513 INFO L933 BasicCegarLoop]: 2196 mSDtfsCounter, 3362 mSDsluCounter, 6042 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3362 SdHoareTripleChecker+Valid, 8238 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:27,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3362 Valid, 8238 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1093 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:46:27,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10970 states. [2021-11-19 14:46:27,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10970 to 7082. [2021-11-19 14:46:28,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7082 states, 4975 states have (on average 1.2868341708542714) internal successors, (6402), 5006 states have internal predecessors, (6402), 1721 states have call successors, (1721), 386 states have call predecessors, (1721), 385 states have return successors, (1727), 1721 states have call predecessors, (1727), 1719 states have call successors, (1727) [2021-11-19 14:46:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7082 states to 7082 states and 9850 transitions. [2021-11-19 14:46:28,141 INFO L78 Accepts]: Start accepts. Automaton has 7082 states and 9850 transitions. Word has length 51 [2021-11-19 14:46:28,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:28,142 INFO L470 AbstractCegarLoop]: Abstraction has 7082 states and 9850 transitions. [2021-11-19 14:46:28,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:46:28,143 INFO L276 IsEmpty]: Start isEmpty. Operand 7082 states and 9850 transitions. [2021-11-19 14:46:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 14:46:28,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:28,146 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:46:28,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:28,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:28,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:28,553 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:28,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash 3416379, now seen corresponding path program 1 times [2021-11-19 14:46:28,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:28,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867949984] [2021-11-19 14:46:28,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:28,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:28,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:28,555 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:28,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:46:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:29,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:46:29,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:29,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:29,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:29,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867949984] [2021-11-19 14:46:29,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867949984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:29,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1655970695] [2021-11-19 14:46:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:29,804 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:29,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:46:29,805 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:46:29,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:46:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:31,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:46:31,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:31,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:31,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1655970695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:31,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593259708] [2021-11-19 14:46:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:31,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:46:31,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:46:31,486 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:46:31,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 14:46:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:32,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:46:32,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:32,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:32,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593259708] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:32,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:46:32,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-19 14:46:32,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713685745] [2021-11-19 14:46:32,655 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:46:32,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:46:32,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:32,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:46:32,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:46:32,656 INFO L87 Difference]: Start difference. First operand 7082 states and 9850 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 1 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 14:46:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:33,165 INFO L93 Difference]: Finished difference Result 14164 states and 19703 transitions. [2021-11-19 14:46:33,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:46:33,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 1 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 60 [2021-11-19 14:46:33,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:33,191 INFO L225 Difference]: With dead ends: 14164 [2021-11-19 14:46:33,191 INFO L226 Difference]: Without dead ends: 7090 [2021-11-19 14:46:33,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:46:33,214 INFO L933 BasicCegarLoop]: 1470 mSDtfsCounter, 7 mSDsluCounter, 4404 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 5874 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:33,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 5874 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:46:33,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7090 states. [2021-11-19 14:46:33,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7090 to 7090. [2021-11-19 14:46:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7090 states, 4983 states have (on average 1.2863736704796307) internal successors, (6410), 5014 states have internal predecessors, (6410), 1721 states have call successors, (1721), 386 states have call predecessors, (1721), 385 states have return successors, (1727), 1721 states have call predecessors, (1727), 1719 states have call successors, (1727) [2021-11-19 14:46:33,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7090 states to 7090 states and 9858 transitions. [2021-11-19 14:46:33,617 INFO L78 Accepts]: Start accepts. Automaton has 7090 states and 9858 transitions. Word has length 60 [2021-11-19 14:46:33,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:33,618 INFO L470 AbstractCegarLoop]: Abstraction has 7090 states and 9858 transitions. [2021-11-19 14:46:33,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 1 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 14:46:33,618 INFO L276 IsEmpty]: Start isEmpty. Operand 7090 states and 9858 transitions. [2021-11-19 14:46:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 14:46:33,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:33,624 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:33,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-19 14:46:33,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:34,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-19 14:46:34,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:34,239 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:34,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1514861259, now seen corresponding path program 2 times [2021-11-19 14:46:34,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:34,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983278238] [2021-11-19 14:46:34,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:46:34,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:34,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:34,242 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:34,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:46:34,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 14:46:34,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:46:35,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:46:35,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:46:35,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:46:36,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:36,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983278238] [2021-11-19 14:46:36,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983278238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:36,076 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:36,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-19 14:46:36,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045876533] [2021-11-19 14:46:36,077 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:36,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:46:36,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:36,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:46:36,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:46:36,078 INFO L87 Difference]: Start difference. First operand 7090 states and 9858 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 14:46:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:56,098 INFO L93 Difference]: Finished difference Result 19973 states and 28496 transitions. [2021-11-19 14:46:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:46:56,100 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 68 [2021-11-19 14:46:56,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:56,149 INFO L225 Difference]: With dead ends: 19973 [2021-11-19 14:46:56,149 INFO L226 Difference]: Without dead ends: 12906 [2021-11-19 14:46:56,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:46:56,174 INFO L933 BasicCegarLoop]: 3357 mSDtfsCounter, 3130 mSDsluCounter, 17133 mSDsCounter, 0 mSdLazyCounter, 3211 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3324 SdHoareTripleChecker+Valid, 20490 SdHoareTripleChecker+Invalid, 4129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 3211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:56,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3324 Valid, 20490 Invalid, 4129 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [918 Valid, 3211 Invalid, 0 Unknown, 0 Unchecked, 18.8s Time] [2021-11-19 14:46:56,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12906 states. [2021-11-19 14:46:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12906 to 7088. [2021-11-19 14:46:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7088 states, 4979 states have (on average 1.285197830889737) internal successors, (6399), 5016 states have internal predecessors, (6399), 1721 states have call successors, (1721), 386 states have call predecessors, (1721), 387 states have return successors, (1724), 1717 states have call predecessors, (1724), 1719 states have call successors, (1724) [2021-11-19 14:46:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7088 states to 7088 states and 9844 transitions. [2021-11-19 14:46:56,899 INFO L78 Accepts]: Start accepts. Automaton has 7088 states and 9844 transitions. Word has length 68 [2021-11-19 14:46:56,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:56,901 INFO L470 AbstractCegarLoop]: Abstraction has 7088 states and 9844 transitions. [2021-11-19 14:46:56,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 14:46:56,901 INFO L276 IsEmpty]: Start isEmpty. Operand 7088 states and 9844 transitions. [2021-11-19 14:46:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-19 14:46:56,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:56,907 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-19 14:46:56,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:57,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:57,123 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:57,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:57,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1734922365, now seen corresponding path program 1 times [2021-11-19 14:46:57,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:57,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764237328] [2021-11-19 14:46:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:57,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:57,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:57,127 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:57,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:46:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:57,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:46:57,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:46:58,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:46:59,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:59,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764237328] [2021-11-19 14:46:59,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764237328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:59,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [735987555] [2021-11-19 14:46:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:59,023 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:59,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:46:59,024 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:46:59,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:46:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:59,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:46:59,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:47:00,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:47:00,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [735987555] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:00,482 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:47:00,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 9] total 18 [2021-11-19 14:47:00,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029438493] [2021-11-19 14:47:00,482 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:00,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:47:00,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:00,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:47:00,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:47:00,484 INFO L87 Difference]: Start difference. First operand 7088 states and 9844 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:47:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:03,608 INFO L93 Difference]: Finished difference Result 22747 states and 32928 transitions. [2021-11-19 14:47:03,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:47:03,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 80 [2021-11-19 14:47:03,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:03,682 INFO L225 Difference]: With dead ends: 22747 [2021-11-19 14:47:03,682 INFO L226 Difference]: Without dead ends: 15682 [2021-11-19 14:47:03,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:47:03,713 INFO L933 BasicCegarLoop]: 2337 mSDtfsCounter, 1756 mSDsluCounter, 2068 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2145 SdHoareTripleChecker+Valid, 4405 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:03,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2145 Valid, 4405 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 14:47:03,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15682 states. [2021-11-19 14:47:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15682 to 15670. [2021-11-19 14:47:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15670 states, 11027 states have (on average 1.3201233336356217) internal successors, (14557), 11078 states have internal predecessors, (14557), 4255 states have call successors, (4255), 386 states have call predecessors, (4255), 387 states have return successors, (4258), 4251 states have call predecessors, (4258), 4253 states have call successors, (4258) [2021-11-19 14:47:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15670 states to 15670 states and 23070 transitions. [2021-11-19 14:47:05,531 INFO L78 Accepts]: Start accepts. Automaton has 15670 states and 23070 transitions. Word has length 80 [2021-11-19 14:47:05,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:05,531 INFO L470 AbstractCegarLoop]: Abstraction has 15670 states and 23070 transitions. [2021-11-19 14:47:05,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:47:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand 15670 states and 23070 transitions. [2021-11-19 14:47:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 14:47:05,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:05,538 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:05,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:05,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:05,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:05,951 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:05,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:05,952 INFO L85 PathProgramCache]: Analyzing trace with hash -701396988, now seen corresponding path program 1 times [2021-11-19 14:47:05,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:05,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639834241] [2021-11-19 14:47:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:05,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:05,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:05,957 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:06,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:47:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:07,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:47:07,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:47:07,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:47:08,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:08,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639834241] [2021-11-19 14:47:08,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639834241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:08,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1056843101] [2021-11-19 14:47:08,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:08,206 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:08,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:47:08,208 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:47:08,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 14:47:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:09,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:47:09,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:47:10,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:47:10,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1056843101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:10,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479716225] [2021-11-19 14:47:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:10,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:47:10,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:47:10,562 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:47:10,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 14:47:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:11,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:47:11,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:47:11,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:47:12,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479716225] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:12,067 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 14:47:12,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 9, 9, 9] total 20 [2021-11-19 14:47:12,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952625165] [2021-11-19 14:47:12,068 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:12,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:47:12,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:12,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:47:12,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:47:12,070 INFO L87 Difference]: Start difference. First operand 15670 states and 23070 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 14:47:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:15,743 INFO L93 Difference]: Finished difference Result 25454 states and 38110 transitions. [2021-11-19 14:47:15,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:47:15,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 78 [2021-11-19 14:47:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:15,858 INFO L225 Difference]: With dead ends: 25454 [2021-11-19 14:47:15,858 INFO L226 Difference]: Without dead ends: 25446 [2021-11-19 14:47:15,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:47:15,870 INFO L933 BasicCegarLoop]: 2903 mSDtfsCounter, 2113 mSDsluCounter, 6752 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2357 SdHoareTripleChecker+Valid, 9655 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:15,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2357 Valid, 9655 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 14:47:15,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25446 states. [2021-11-19 14:47:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25446 to 15682. [2021-11-19 14:47:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15682 states, 11035 states have (on average 1.3198912550974173) internal successors, (14565), 11086 states have internal predecessors, (14565), 4259 states have call successors, (4259), 386 states have call predecessors, (4259), 387 states have return successors, (4262), 4255 states have call predecessors, (4262), 4257 states have call successors, (4262) [2021-11-19 14:47:18,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15682 states to 15682 states and 23086 transitions. [2021-11-19 14:47:18,088 INFO L78 Accepts]: Start accepts. Automaton has 15682 states and 23086 transitions. Word has length 78 [2021-11-19 14:47:18,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:18,089 INFO L470 AbstractCegarLoop]: Abstraction has 15682 states and 23086 transitions. [2021-11-19 14:47:18,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 14:47:18,089 INFO L276 IsEmpty]: Start isEmpty. Operand 15682 states and 23086 transitions. [2021-11-19 14:47:18,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 14:47:18,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:18,097 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:18,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:18,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:18,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:18,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:18,711 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:18,712 INFO L85 PathProgramCache]: Analyzing trace with hash -83361928, now seen corresponding path program 1 times [2021-11-19 14:47:18,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:18,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58670806] [2021-11-19 14:47:18,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:18,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:18,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:18,715 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:18,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:47:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:19,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:47:19,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:47:20,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:47:20,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:20,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58670806] [2021-11-19 14:47:20,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58670806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:20,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [681803555] [2021-11-19 14:47:20,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:20,824 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:20,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:47:20,825 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:47:20,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-19 14:47:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:21,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:47:21,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:47:21,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:47:22,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [681803555] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:22,158 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:47:22,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 9] total 20 [2021-11-19 14:47:22,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259697857] [2021-11-19 14:47:22,158 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:22,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:47:22,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:22,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:47:22,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:47:22,161 INFO L87 Difference]: Start difference. First operand 15682 states and 23086 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:47:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:25,430 INFO L93 Difference]: Finished difference Result 27056 states and 39532 transitions. [2021-11-19 14:47:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:47:25,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 82 [2021-11-19 14:47:25,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:25,476 INFO L225 Difference]: With dead ends: 27056 [2021-11-19 14:47:25,477 INFO L226 Difference]: Without dead ends: 11397 [2021-11-19 14:47:25,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:47:25,519 INFO L933 BasicCegarLoop]: 2412 mSDtfsCounter, 3120 mSDsluCounter, 2750 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 5162 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:25,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3519 Valid, 5162 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [598 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:47:25,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11397 states. [2021-11-19 14:47:26,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11397 to 11391. [2021-11-19 14:47:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11391 states, 8011 states have (on average 1.3054549993758582) internal successors, (10458), 8055 states have internal predecessors, (10458), 2992 states have call successors, (2992), 386 states have call predecessors, (2992), 387 states have return successors, (2995), 2988 states have call predecessors, (2995), 2990 states have call successors, (2995) [2021-11-19 14:47:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11391 states to 11391 states and 16445 transitions. [2021-11-19 14:47:26,792 INFO L78 Accepts]: Start accepts. Automaton has 11391 states and 16445 transitions. Word has length 82 [2021-11-19 14:47:26,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:26,792 INFO L470 AbstractCegarLoop]: Abstraction has 11391 states and 16445 transitions. [2021-11-19 14:47:26,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:47:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 11391 states and 16445 transitions. [2021-11-19 14:47:26,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:47:26,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:26,803 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 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] [2021-11-19 14:47:26,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:27,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-19 14:47:27,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:27,227 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:27,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:27,228 INFO L85 PathProgramCache]: Analyzing trace with hash -615479672, now seen corresponding path program 1 times [2021-11-19 14:47:27,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:27,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347502412] [2021-11-19 14:47:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:27,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:27,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:27,231 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:27,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:47:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:28,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:47:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:47:28,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:47:29,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:29,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347502412] [2021-11-19 14:47:29,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347502412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:29,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1252873824] [2021-11-19 14:47:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:29,691 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:29,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:47:29,692 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:47:29,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-19 14:47:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:30,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:47:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 14:47:31,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 14:47:31,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1252873824] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:31,621 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:47:31,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9, 9] total 20 [2021-11-19 14:47:31,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102540674] [2021-11-19 14:47:31,622 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:31,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:47:31,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:31,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:47:31,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:47:31,624 INFO L87 Difference]: Start difference. First operand 11391 states and 16445 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 14:47:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:33,088 INFO L93 Difference]: Finished difference Result 22822 states and 32941 transitions. [2021-11-19 14:47:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:47:33,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 101 [2021-11-19 14:47:33,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:33,141 INFO L225 Difference]: With dead ends: 22822 [2021-11-19 14:47:33,142 INFO L226 Difference]: Without dead ends: 11454 [2021-11-19 14:47:33,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 381 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:47:33,180 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 25 mSDsluCounter, 4396 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 5864 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:33,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 5864 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:47:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11454 states. [2021-11-19 14:47:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11454 to 11405. [2021-11-19 14:47:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11405 states, 8025 states have (on average 1.3049221183800623) internal successors, (10472), 8062 states have internal predecessors, (10472), 2992 states have call successors, (2992), 386 states have call predecessors, (2992), 387 states have return successors, (2995), 2988 states have call predecessors, (2995), 2990 states have call successors, (2995) [2021-11-19 14:47:34,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11405 states to 11405 states and 16459 transitions. [2021-11-19 14:47:34,378 INFO L78 Accepts]: Start accepts. Automaton has 11405 states and 16459 transitions. Word has length 101 [2021-11-19 14:47:34,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:34,379 INFO L470 AbstractCegarLoop]: Abstraction has 11405 states and 16459 transitions. [2021-11-19 14:47:34,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 14:47:34,379 INFO L276 IsEmpty]: Start isEmpty. Operand 11405 states and 16459 transitions. [2021-11-19 14:47:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 14:47:34,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:34,389 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 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] [2021-11-19 14:47:34,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:34,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-19 14:47:34,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:34,803 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:34,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:34,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1696642470, now seen corresponding path program 1 times [2021-11-19 14:47:34,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:34,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603990936] [2021-11-19 14:47:34,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:34,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:34,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:34,806 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:34,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:47:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:35,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:47:35,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:47:36,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:47:36,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:36,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603990936] [2021-11-19 14:47:36,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603990936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:36,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1428194447] [2021-11-19 14:47:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:36,948 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:36,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:47:36,957 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:47:36,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-19 14:47:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:38,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:47:38,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:47:39,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:47:39,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1428194447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:39,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448295078] [2021-11-19 14:47:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:39,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:47:39,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:47:39,446 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:47:39,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 14:47:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:40,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:47:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:47:40,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 14:47:41,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448295078] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:41,096 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 14:47:41,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 9, 9, 9] total 20 [2021-11-19 14:47:41,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163077618] [2021-11-19 14:47:41,096 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:41,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:47:41,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:41,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:47:41,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:47:41,097 INFO L87 Difference]: Start difference. First operand 11405 states and 16459 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:47:41,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:41,940 INFO L93 Difference]: Finished difference Result 22141 states and 31903 transitions. [2021-11-19 14:47:41,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:47:41,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 102 [2021-11-19 14:47:41,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:41,985 INFO L225 Difference]: With dead ends: 22141 [2021-11-19 14:47:41,985 INFO L226 Difference]: Without dead ends: 10747 [2021-11-19 14:47:42,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:47:42,012 INFO L933 BasicCegarLoop]: 1484 mSDtfsCounter, 25 mSDsluCounter, 2949 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 4433 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:42,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 4433 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:47:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10747 states. [2021-11-19 14:47:42,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10747 to 10729. [2021-11-19 14:47:42,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10729 states, 7547 states have (on average 1.302769312309527) internal successors, (9832), 7586 states have internal predecessors, (9832), 2798 states have call successors, (2798), 382 states have call predecessors, (2798), 383 states have return successors, (2801), 2789 states have call predecessors, (2801), 2796 states have call successors, (2801) [2021-11-19 14:47:43,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10729 states to 10729 states and 15431 transitions. [2021-11-19 14:47:43,040 INFO L78 Accepts]: Start accepts. Automaton has 10729 states and 15431 transitions. Word has length 102 [2021-11-19 14:47:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:43,040 INFO L470 AbstractCegarLoop]: Abstraction has 10729 states and 15431 transitions. [2021-11-19 14:47:43,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:47:43,040 INFO L276 IsEmpty]: Start isEmpty. Operand 10729 states and 15431 transitions. [2021-11-19 14:47:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 14:47:43,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:43,046 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-19 14:47:43,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:43,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:43,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-19 14:47:43,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:43,659 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:43,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2109244067, now seen corresponding path program 1 times [2021-11-19 14:47:43,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:43,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35205023] [2021-11-19 14:47:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:43,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:43,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:43,683 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:43,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:47:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:44,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:47:44,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:47:45,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:47:45,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:45,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35205023] [2021-11-19 14:47:45,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35205023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:45,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [968840905] [2021-11-19 14:47:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:45,885 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:45,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:47:45,887 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:47:45,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-19 14:47:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:46,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:47:46,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:47:47,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:47:47,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [968840905] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:47,555 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:47:47,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [9, 9] total 17 [2021-11-19 14:47:47,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838374] [2021-11-19 14:47:47,556 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:47,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:47:47,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:47,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:47:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:47:47,557 INFO L87 Difference]: Start difference. First operand 10729 states and 15431 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 14:47:48,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:48,317 INFO L93 Difference]: Finished difference Result 21396 states and 30771 transitions. [2021-11-19 14:47:48,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:47:48,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 98 [2021-11-19 14:47:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:48,347 INFO L225 Difference]: With dead ends: 21396 [2021-11-19 14:47:48,347 INFO L226 Difference]: Without dead ends: 10690 [2021-11-19 14:47:48,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:47:48,374 INFO L933 BasicCegarLoop]: 1464 mSDtfsCounter, 1397 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1397 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:48,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1397 Valid, 1464 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:47:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10690 states. [2021-11-19 14:47:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10690 to 10690. [2021-11-19 14:47:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10690 states, 7508 states have (on average 1.2991475759190196) internal successors, (9754), 7547 states have internal predecessors, (9754), 2798 states have call successors, (2798), 382 states have call predecessors, (2798), 383 states have return successors, (2801), 2789 states have call predecessors, (2801), 2796 states have call successors, (2801) [2021-11-19 14:47:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10690 states to 10690 states and 15353 transitions. [2021-11-19 14:47:49,224 INFO L78 Accepts]: Start accepts. Automaton has 10690 states and 15353 transitions. Word has length 98 [2021-11-19 14:47:49,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:49,224 INFO L470 AbstractCegarLoop]: Abstraction has 10690 states and 15353 transitions. [2021-11-19 14:47:49,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 14:47:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 10690 states and 15353 transitions. [2021-11-19 14:47:49,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:47:49,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:49,233 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-19 14:47:49,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:49,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:49,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:49,647 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:49,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:49,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1158141034, now seen corresponding path program 1 times [2021-11-19 14:47:49,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:49,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999767011] [2021-11-19 14:47:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:49,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:49,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:49,651 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:49,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:47:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:50,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:47:50,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:47:51,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:47:51,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:51,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999767011] [2021-11-19 14:47:51,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999767011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:51,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1088251631] [2021-11-19 14:47:51,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:51,868 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:51,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:47:51,869 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:47:51,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-19 14:47:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:53,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:47:53,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:47:53,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:47:54,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1088251631] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:54,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901983496] [2021-11-19 14:47:54,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:54,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:47:54,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:47:54,348 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:47:54,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-19 14:47:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:55,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:47:55,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:47:55,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:47:56,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901983496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:56,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:47:56,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-19 14:47:56,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310799818] [2021-11-19 14:47:56,373 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:47:56,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:47:56,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:56,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:47:56,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:47:56,375 INFO L87 Difference]: Start difference. First operand 10690 states and 15353 transitions. Second operand has 16 states, 16 states have (on average 7.5) internal successors, (120), 16 states have internal predecessors, (120), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:47:58,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:58,327 INFO L93 Difference]: Finished difference Result 21380 states and 30713 transitions. [2021-11-19 14:47:58,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:47:58,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.5) internal successors, (120), 16 states have internal predecessors, (120), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 106 [2021-11-19 14:47:58,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:58,360 INFO L225 Difference]: With dead ends: 21380 [2021-11-19 14:47:58,361 INFO L226 Difference]: Without dead ends: 10706 [2021-11-19 14:47:58,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:47:58,382 INFO L933 BasicCegarLoop]: 1463 mSDtfsCounter, 14 mSDsluCounter, 11688 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 13151 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:58,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 13151 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:47:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10706 states. [2021-11-19 14:47:59,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10706 to 10706. [2021-11-19 14:47:59,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10706 states, 7524 states have (on average 1.2985114300903775) internal successors, (9770), 7563 states have internal predecessors, (9770), 2798 states have call successors, (2798), 382 states have call predecessors, (2798), 383 states have return successors, (2801), 2789 states have call predecessors, (2801), 2796 states have call successors, (2801) [2021-11-19 14:47:59,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10706 states to 10706 states and 15369 transitions. [2021-11-19 14:47:59,270 INFO L78 Accepts]: Start accepts. Automaton has 10706 states and 15369 transitions. Word has length 106 [2021-11-19 14:47:59,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:59,271 INFO L470 AbstractCegarLoop]: Abstraction has 10706 states and 15369 transitions. [2021-11-19 14:47:59,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.5) internal successors, (120), 16 states have internal predecessors, (120), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:47:59,271 INFO L276 IsEmpty]: Start isEmpty. Operand 10706 states and 15369 transitions. [2021-11-19 14:47:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 14:47:59,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:59,279 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 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] [2021-11-19 14:47:59,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:59,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:59,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:59,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:59,903 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:59,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:59,904 INFO L85 PathProgramCache]: Analyzing trace with hash -216086858, now seen corresponding path program 2 times [2021-11-19 14:47:59,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:59,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229759660] [2021-11-19 14:47:59,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:47:59,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:59,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:59,906 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:59,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:48:34,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:48:34,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:48:34,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 14:48:34,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:48:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:48:35,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:48:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:48:37,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:48:37,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229759660] [2021-11-19 14:48:37,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229759660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:48:37,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1043314007] [2021-11-19 14:48:37,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:48:37,367 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:48:37,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:48:37,368 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:48:37,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-19 14:48:55,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:48:55,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:48:55,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 14:48:55,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:48:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:48:56,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:48:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:48:56,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1043314007] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:48:56,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246377774] [2021-11-19 14:48:56,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:48:56,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:48:56,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:48:56,526 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:48:56,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-19 14:49:12,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:49:12,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:49:12,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 14:49:12,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:49:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:49:12,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:49:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:49:13,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246377774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:49:13,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:49:13,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 32 [2021-11-19 14:49:13,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162034507] [2021-11-19 14:49:13,434 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:49:13,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 14:49:13,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:49:13,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 14:49:13,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-11-19 14:49:13,437 INFO L87 Difference]: Start difference. First operand 10706 states and 15369 transitions. Second operand has 32 states, 32 states have (on average 4.75) internal successors, (152), 32 states have internal predecessors, (152), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:49:18,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:49:18,639 INFO L93 Difference]: Finished difference Result 21412 states and 30753 transitions. [2021-11-19 14:49:18,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 14:49:18,640 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.75) internal successors, (152), 32 states have internal predecessors, (152), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 122 [2021-11-19 14:49:18,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:49:18,669 INFO L225 Difference]: With dead ends: 21412 [2021-11-19 14:49:18,669 INFO L226 Difference]: Without dead ends: 10738 [2021-11-19 14:49:18,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 14:49:18,693 INFO L933 BasicCegarLoop]: 1463 mSDtfsCounter, 31 mSDsluCounter, 21915 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 23378 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:49:18,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 23378 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 14:49:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10738 states. [2021-11-19 14:49:19,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10738 to 10738. [2021-11-19 14:49:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10738 states, 7556 states have (on average 1.2972472207517205) internal successors, (9802), 7595 states have internal predecessors, (9802), 2798 states have call successors, (2798), 382 states have call predecessors, (2798), 383 states have return successors, (2801), 2789 states have call predecessors, (2801), 2796 states have call successors, (2801) [2021-11-19 14:49:19,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10738 states to 10738 states and 15401 transitions. [2021-11-19 14:49:19,639 INFO L78 Accepts]: Start accepts. Automaton has 10738 states and 15401 transitions. Word has length 122 [2021-11-19 14:49:19,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:49:19,640 INFO L470 AbstractCegarLoop]: Abstraction has 10738 states and 15401 transitions. [2021-11-19 14:49:19,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.75) internal successors, (152), 32 states have internal predecessors, (152), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:49:19,640 INFO L276 IsEmpty]: Start isEmpty. Operand 10738 states and 15401 transitions. [2021-11-19 14:49:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 14:49:19,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:49:19,646 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 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] [2021-11-19 14:49:19,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:49:19,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:49:20,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-19 14:49:20,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:49:20,247 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:49:20,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:49:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2015544074, now seen corresponding path program 3 times [2021-11-19 14:49:20,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:49:20,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748066277] [2021-11-19 14:49:20,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:49:20,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:49:20,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:49:20,250 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:49:20,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-19 14:50:39,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-11-19 14:50:39,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:50:39,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 14:50:39,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:50:42,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:50:49,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:49,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748066277] [2021-11-19 14:50:49,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748066277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:50:49,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [499947442] [2021-11-19 14:50:49,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:50:49,214 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:49,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:50:49,221 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:50:49,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-19 14:52:51,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-11-19 14:52:51,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:52:51,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 14:52:51,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:52:52,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:52:53,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [499947442] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:52:53,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203991735] [2021-11-19 14:52:53,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:52:53,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:52:53,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:52:53,690 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:52:53,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad651045-8c98-47d7-a214-66defa861e35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process