./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 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/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_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:33:09,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:33:09,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:33:09,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:33:09,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:33:09,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:33:09,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:33:09,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:33:09,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:33:09,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:33:09,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:33:09,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:33:09,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:33:09,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:33:09,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:33:09,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:33:09,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:33:09,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:33:09,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:33:09,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:33:09,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:33:09,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:33:09,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:33:09,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:33:09,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:33:09,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:33:09,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:33:09,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:33:09,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:33:09,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:33:09,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:33:09,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:33:09,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:33:09,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:33:09,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:33:09,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:33:09,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:33:09,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:33:09,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:33:09,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:33:09,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:33:09,447 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:33:09,494 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:33:09,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:33:09,496 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:33:09,496 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:33:09,497 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:33:09,497 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:33:09,497 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:33:09,497 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:33:09,498 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:33:09,498 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:33:09,499 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:33:09,499 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:33:09,499 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:33:09,500 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:33:09,500 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:33:09,500 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:33:09,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:33:09,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:33:09,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:33:09,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:33:09,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:33:09,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:33:09,502 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:33:09,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:33:09,503 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:33:09,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:33:09,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:33:09,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:33:09,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:33:09,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:33:09,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:33:09,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:33:09,506 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:33:09,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:33:09,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:33:09,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:33:09,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:33:09,507 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_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 [2021-11-12 23:33:09,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:33:09,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:33:09,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:33:09,811 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:33:09,812 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:33:09,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-12 23:33:09,894 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/data/a14685cee/0eb2b3a4fb8a4d85bb27d5a8e33fc6ae/FLAGfd662c44c [2021-11-12 23:33:10,789 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:33:10,791 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-12 23:33:10,844 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/data/a14685cee/0eb2b3a4fb8a4d85bb27d5a8e33fc6ae/FLAGfd662c44c [2021-11-12 23:33:11,278 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/data/a14685cee/0eb2b3a4fb8a4d85bb27d5a8e33fc6ae [2021-11-12 23:33:11,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:33:11,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:33:11,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:33:11,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:33:11,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:33:11,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:33:11" (1/1) ... [2021-11-12 23:33:11,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc62d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:11, skipping insertion in model container [2021-11-12 23:33:11,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:33:11" (1/1) ... [2021-11-12 23:33:11,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:33:11,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:33:13,245 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-12 23:33:13,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:33:13,313 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:33:13,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d555771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:13, skipping insertion in model container [2021-11-12 23:33:13,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:33:13,314 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:33:13,317 INFO L158 Benchmark]: Toolchain (without parser) took 2032.25ms. Allocated memory was 96.5MB in the beginning and 132.1MB in the end (delta: 35.7MB). Free memory was 54.8MB in the beginning and 85.5MB in the end (delta: -30.7MB). Peak memory consumption was 22.7MB. Max. memory is 16.1GB. [2021-11-12 23:33:13,317 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 73.4MB. Free memory was 33.4MB in the beginning and 33.4MB in the end (delta: 40.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:33:13,318 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2025.26ms. Allocated memory was 96.5MB in the beginning and 132.1MB in the end (delta: 35.7MB). Free memory was 54.6MB in the beginning and 85.5MB in the end (delta: -30.9MB). Peak memory consumption was 22.7MB. Max. memory is 16.1GB. [2021-11-12 23:33:13,320 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 73.4MB. Free memory was 33.4MB in the beginning and 33.4MB in the end (delta: 40.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2025.26ms. Allocated memory was 96.5MB in the beginning and 132.1MB in the end (delta: 35.7MB). Free memory was 54.6MB in the beginning and 85.5MB in the end (delta: -30.9MB). Peak memory consumption was 22.7MB. 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_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/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_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:33:15,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:33:15,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:33:15,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:33:15,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:33:15,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:33:15,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:33:15,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:33:15,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:33:15,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:33:15,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:33:15,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:33:15,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:33:15,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:33:15,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:33:15,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:33:15,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:33:15,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:33:15,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:33:15,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:33:15,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:33:15,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:33:15,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:33:15,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:33:15,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:33:15,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:33:15,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:33:15,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:33:15,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:33:15,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:33:15,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:33:15,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:33:15,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:33:15,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:33:15,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:33:15,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:33:15,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:33:15,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:33:15,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:33:15,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:33:15,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:33:15,881 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:33:15,927 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:33:15,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:33:15,928 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:33:15,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:33:15,929 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:33:15,929 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:33:15,929 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:33:15,930 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:33:15,930 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:33:15,930 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:33:15,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:33:15,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:33:15,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:33:15,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:33:15,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:33:15,933 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:33:15,934 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:33:15,934 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:33:15,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:33:15,934 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:33:15,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:33:15,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:33:15,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:33:15,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:33:15,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:33:15,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:33:15,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:33:15,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:33:15,936 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:33:15,936 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:15,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:33:15,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:33:15,937 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:33:15,937 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_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 [2021-11-12 23:33:16,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:33:16,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:33:16,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:33:16,373 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:33:16,374 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:33:16,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-12 23:33:16,474 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/data/d3f4be001/e9a33e67b9654feaae55178bdac53d3f/FLAGea204f262 [2021-11-12 23:33:17,467 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:33:17,468 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-12 23:33:17,507 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/data/d3f4be001/e9a33e67b9654feaae55178bdac53d3f/FLAGea204f262 [2021-11-12 23:33:17,911 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/data/d3f4be001/e9a33e67b9654feaae55178bdac53d3f [2021-11-12 23:33:17,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:33:17,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:33:17,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:33:17,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:33:17,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:33:17,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:33:17" (1/1) ... [2021-11-12 23:33:17,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@764c7f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:17, skipping insertion in model container [2021-11-12 23:33:17,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:33:17" (1/1) ... [2021-11-12 23:33:17,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:33:18,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:33:19,821 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-12 23:33:19,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:33:19,918 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:33:19,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:33:20,262 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-12 23:33:20,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:33:20,292 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:33:20,640 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-12 23:33:20,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:33:21,099 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:33:21,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:21 WrapperNode [2021-11-12 23:33:21,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:33:21,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:33:21,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:33:21,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:33:21,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:21" (1/1) ... [2021-11-12 23:33:21,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:21" (1/1) ... [2021-11-12 23:33:21,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:33:21,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:33:21,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:33:21,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:33:21,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:21" (1/1) ... [2021-11-12 23:33:21,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:21" (1/1) ... [2021-11-12 23:33:21,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:21" (1/1) ... [2021-11-12 23:33:21,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:21" (1/1) ... [2021-11-12 23:33:21,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:21" (1/1) ... [2021-11-12 23:33:21,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:21" (1/1) ... [2021-11-12 23:33:21,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:21" (1/1) ... [2021-11-12 23:33:21,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:33:21,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:33:21,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:33:21,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:33:21,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:21" (1/1) ... [2021-11-12 23:33:21,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:33:21,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:33:21,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:33:21,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:33:21,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:33:21,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:33:21,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:33:21,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:33:21,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 23:33:21,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:33:21,819 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-12 23:33:21,819 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-12 23:33:21,819 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-12 23:33:21,819 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-12 23:33:21,819 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-12 23:33:21,819 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-12 23:33:21,820 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:33:21,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:33:21,820 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-12 23:33:21,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-12 23:33:21,820 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-12 23:33:21,820 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-12 23:33:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-12 23:33:21,821 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-12 23:33:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-12 23:33:21,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-12 23:33:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-12 23:33:21,822 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-12 23:33:21,822 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toio [2021-11-12 23:33:21,822 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toio [2021-11-12 23:33:21,822 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-12 23:33:21,822 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-12 23:33:21,822 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-12 23:33:21,823 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-12 23:33:21,823 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-12 23:33:21,823 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-12 23:33:21,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:33:21,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:33:21,823 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2021-11-12 23:33:21,824 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2021-11-12 23:33:21,824 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap [2021-11-12 23:33:21,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap [2021-11-12 23:33:21,824 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-12 23:33:21,825 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-12 23:33:21,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:33:21,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:33:21,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:33:21,825 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2021-11-12 23:33:21,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2021-11-12 23:33:21,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:33:21,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:33:21,826 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-12 23:33:21,827 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-12 23:33:21,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:33:21,827 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-12 23:33:21,827 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-12 23:33:21,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:33:21,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:33:21,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:33:21,830 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-12 23:33:21,830 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-12 23:33:21,830 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-12 23:33:21,830 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-12 23:33:21,831 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-12 23:33:21,831 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-12 23:33:21,831 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_type_trans [2021-11-12 23:33:21,832 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_type_trans [2021-11-12 23:33:21,832 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-12 23:33:21,832 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-12 23:33:21,832 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-12 23:33:21,832 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-12 23:33:21,832 INFO L130 BoogieDeclarations]: Found specification of procedure farsync_type_trans [2021-11-12 23:33:21,833 INFO L138 BoogieDeclarations]: Found implementation of procedure farsync_type_trans [2021-11-12 23:33:21,833 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-12 23:33:21,833 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-12 23:33:21,833 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-12 23:33:21,833 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-12 23:33:21,833 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-12 23:33:21,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-12 23:33:21,835 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-12 23:33:21,835 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-12 23:33:21,835 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2021-11-12 23:33:21,835 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2021-11-12 23:33:21,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:33:21,835 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:33:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure fst_issue_cmd [2021-11-12 23:33:21,836 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_issue_cmd [2021-11-12 23:33:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 23:33:21,836 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 23:33:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-12 23:33:21,837 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-12 23:33:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-12 23:33:21,838 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-12 23:33:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure fst_disable_intr [2021-11-12 23:33:21,838 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_disable_intr [2021-11-12 23:33:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:33:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 23:33:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:33:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:33:21,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:33:21,841 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-12 23:33:21,841 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-12 23:33:21,841 INFO L130 BoogieDeclarations]: Found specification of procedure fst_cpureset [2021-11-12 23:33:21,842 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_cpureset [2021-11-12 23:33:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:33:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:33:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 23:33:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:33:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-11-12 23:33:21,843 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-11-12 23:33:21,843 INFO L130 BoogieDeclarations]: Found specification of procedure fst_process_rx_status [2021-11-12 23:33:21,843 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_process_rx_status [2021-11-12 23:33:21,843 INFO L130 BoogieDeclarations]: Found specification of procedure fst_q_work_item [2021-11-12 23:33:21,844 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_q_work_item [2021-11-12 23:33:21,844 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-12 23:33:21,844 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-12 23:33:21,845 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-12 23:33:21,845 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-12 23:33:21,848 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-12 23:33:21,849 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-12 23:33:21,849 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_ioctl [2021-11-12 23:33:21,849 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_ioctl [2021-11-12 23:33:21,850 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-12 23:33:21,852 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-12 23:33:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-12 23:33:21,852 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-12 23:33:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-12 23:33:21,858 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-12 23:33:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-12 23:33:21,859 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-12 23:33:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure fst_clear_intr [2021-11-12 23:33:21,859 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_clear_intr [2021-11-12 23:33:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:33:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2021-11-12 23:33:21,860 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2021-11-12 23:33:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2021-11-12 23:33:21,860 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2021-11-12 23:33:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2021-11-12 23:33:21,860 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2021-11-12 23:33:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-12 23:33:21,861 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-12 23:33:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:33:21,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:33:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-12 23:33:21,861 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-12 23:33:27,705 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 23:33:27,712 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 23:33:27,722 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 23:33:27,723 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 23:33:27,725 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 23:33:27,726 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 23:33:27,737 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 23:33:50,872 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##258: assume false; [2021-11-12 23:33:50,872 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##259: assume !false; [2021-11-12 23:33:50,872 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##265: assume !false; [2021-11-12 23:33:50,873 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##264: assume false; [2021-11-12 23:33:50,873 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##214: assume !false; [2021-11-12 23:33:50,873 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##213: assume false; [2021-11-12 23:33:50,873 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##228: assume !false; [2021-11-12 23:33:50,873 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##227: assume false; [2021-11-12 23:33:50,873 INFO L766 $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; [2021-11-12 23:33:50,874 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume false; [2021-11-12 23:33:50,874 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2021-11-12 23:33:50,874 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2021-11-12 23:33:50,874 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##391: assume !false; [2021-11-12 23:33:50,874 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##390: assume false; [2021-11-12 23:33:50,948 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:33:50,948 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:33:50,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:33:50 BoogieIcfgContainer [2021-11-12 23:33:50,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:33:50,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:33:50,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:33:50,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:33:50,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:33:17" (1/3) ... [2021-11-12 23:33:50,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6320e9b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:33:50, skipping insertion in model container [2021-11-12 23:33:50,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:33:21" (2/3) ... [2021-11-12 23:33:50,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6320e9b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:33:50, skipping insertion in model container [2021-11-12 23:33:50,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:33:50" (3/3) ... [2021-11-12 23:33:50,972 INFO L111 eAbstractionObserver]: Analyzing ICFG module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-12 23:33:50,978 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:33:50,978 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:33:51,040 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:33:51,047 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:33:51,047 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:33:51,097 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) [2021-11-12 23:33:51,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 23:33:51,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:51,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:51,103 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:51,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash 953068106, now seen corresponding path program 1 times [2021-11-12 23:33:51,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:51,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839002093] [2021-11-12 23:33:51,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:51,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:51,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:51,132 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:51,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:33:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:52,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:33:52,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:33:52,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:33:52,567 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:52,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839002093] [2021-11-12 23:33:52,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839002093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:52,568 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:33:52,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:33:52,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630904978] [2021-11-12 23:33:52,571 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:52,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:33:52,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:52,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:33:52,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:33:52,611 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) [2021-11-12 23:33:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:52,882 INFO L93 Difference]: Finished difference Result 2124 states and 2973 transitions. [2021-11-12 23:33:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:33:52,885 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 [2021-11-12 23:33:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:52,909 INFO L225 Difference]: With dead ends: 2124 [2021-11-12 23:33:52,909 INFO L226 Difference]: Without dead ends: 1061 [2021-11-12 23:33:52,919 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 [2021-11-12 23:33:52,923 INFO L933 BasicCegarLoop]: 1475 mSDtfsCounter, 2 mSDsluCounter, 2946 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4421 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.73ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:52,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4421 Invalid, 9 Unknown, 0 Unchecked, 43.73ms Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 45.33ms Time] [2021-11-12 23:33:52,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-11-12 23:33:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 1061. [2021-11-12 23:33:53,070 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) [2021-11-12 23:33:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1476 transitions. [2021-11-12 23:33:53,083 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1476 transitions. Word has length 21 [2021-11-12 23:33:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:53,083 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1476 transitions. [2021-11-12 23:33:53,084 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) [2021-11-12 23:33:53,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1476 transitions. [2021-11-12 23:33:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-12 23:33:53,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:53,086 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] [2021-11-12 23:33:53,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:53,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:53,311 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:53,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1523179650, now seen corresponding path program 1 times [2021-11-12 23:33:53,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:53,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091023776] [2021-11-12 23:33:53,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:53,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:53,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:53,319 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:53,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:33:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:54,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:33:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:33:54,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:33:54,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:54,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091023776] [2021-11-12 23:33:54,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091023776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:54,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [752678147] [2021-11-12 23:33:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:54,935 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:54,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:54,938 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:54,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-12 23:33:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:55,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:33:55,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:33:56,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:33:56,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [752678147] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:56,265 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:33:56,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [5, 5] total 9 [2021-11-12 23:33:56,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876728027] [2021-11-12 23:33:56,266 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:56,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:33:56,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:56,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:33:56,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:33:56,268 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) [2021-11-12 23:33:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:56,463 INFO L93 Difference]: Finished difference Result 3151 states and 4390 transitions. [2021-11-12 23:33:56,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:33:56,464 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 [2021-11-12 23:33:56,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:56,487 INFO L225 Difference]: With dead ends: 3151 [2021-11-12 23:33:56,487 INFO L226 Difference]: Without dead ends: 2100 [2021-11-12 23:33:56,493 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 [2021-11-12 23:33:56,495 INFO L933 BasicCegarLoop]: 1973 mSDtfsCounter, 1448 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 3425 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.98ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:56,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1448 Valid, 3425 Invalid, 8 Unknown, 0 Unchecked, 25.98ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 30.12ms Time] [2021-11-12 23:33:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-11-12 23:33:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2097. [2021-11-12 23:33:56,729 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) [2021-11-12 23:33:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 2918 transitions. [2021-11-12 23:33:56,749 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 2918 transitions. Word has length 25 [2021-11-12 23:33:56,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:56,751 INFO L470 AbstractCegarLoop]: Abstraction has 2097 states and 2918 transitions. [2021-11-12 23:33:56,752 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) [2021-11-12 23:33:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 2918 transitions. [2021-11-12 23:33:56,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-12 23:33:56,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:56,762 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] [2021-11-12 23:33:56,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:56,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-12 23:33:57,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:57,179 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:57,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1125436765, now seen corresponding path program 1 times [2021-11-12 23:33:57,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:57,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516274272] [2021-11-12 23:33:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:57,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:57,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:57,184 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:57,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:33:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:58,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:33:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:33:58,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:33:59,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:59,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516274272] [2021-11-12 23:33:59,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516274272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:59,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2111223492] [2021-11-12 23:33:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:59,018 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:59,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:59,022 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:59,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-12 23:33:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:59,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:33:59,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:34:00,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:34:00,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2111223492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:34:00,394 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:34:00,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-12 23:34:00,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943062804] [2021-11-12 23:34:00,395 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:34:00,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:34:00,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:34:00,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:34:00,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:34:00,396 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) [2021-11-12 23:34:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:01,748 INFO L93 Difference]: Finished difference Result 6061 states and 8722 transitions. [2021-11-12 23:34:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:34:01,749 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 [2021-11-12 23:34:01,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:01,789 INFO L225 Difference]: With dead ends: 6061 [2021-11-12 23:34:01,789 INFO L226 Difference]: Without dead ends: 3979 [2021-11-12 23:34:01,801 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 [2021-11-12 23:34:01,806 INFO L933 BasicCegarLoop]: 2636 mSDtfsCounter, 2190 mSDsluCounter, 6381 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 746.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 9017 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.45ms SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 914.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:01,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2383 Valid, 9017 Invalid, 599 Unknown, 0 Unchecked, 38.45ms Time], IncrementalHoareTripleChecker [583 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 914.57ms Time] [2021-11-12 23:34:01,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2021-11-12 23:34:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 2031. [2021-11-12 23:34:02,080 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) [2021-11-12 23:34:02,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2816 transitions. [2021-11-12 23:34:02,100 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2816 transitions. Word has length 45 [2021-11-12 23:34:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:02,101 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 2816 transitions. [2021-11-12 23:34:02,101 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) [2021-11-12 23:34:02,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2816 transitions. [2021-11-12 23:34:02,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-12 23:34:02,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:02,109 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] [2021-11-12 23:34:02,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:02,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-12 23:34:02,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:34:02,516 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:02,517 INFO L85 PathProgramCache]: Analyzing trace with hash -8820867, now seen corresponding path program 1 times [2021-11-12 23:34:02,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:34:02,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145335428] [2021-11-12 23:34:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:02,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:34:02,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:34:02,521 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:34:02,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:34:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:03,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:34:03,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:03,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:04,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:34:04,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145335428] [2021-11-12 23:34:04,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145335428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:34:04,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1325160737] [2021-11-12 23:34:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:04,266 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:34:04,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:34:04,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:34:04,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 23:34:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:06,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:34:06,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:06,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:06,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1325160737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:34:06,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857294684] [2021-11-12 23:34:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:06,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:34:06,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:34:06,468 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:34:06,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 23:34:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:07,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:34:07,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:34:07,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:34:08,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857294684] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:34:08,280 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:34:08,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-12 23:34:08,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740428190] [2021-11-12 23:34:08,281 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:34:08,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:34:08,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:34:08,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:34:08,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:34:08,282 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) [2021-11-12 23:34:10,429 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:29,025 INFO L93 Difference]: Finished difference Result 8172 states and 11361 transitions. [2021-11-12 23:34:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:34:29,026 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 [2021-11-12 23:34:29,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:29,089 INFO L225 Difference]: With dead ends: 8172 [2021-11-12 23:34:29,089 INFO L226 Difference]: Without dead ends: 7118 [2021-11-12 23:34:29,098 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 [2021-11-12 23:34:29,099 INFO L933 BasicCegarLoop]: 3820 mSDtfsCounter, 8110 mSDsluCounter, 4885 mSDsCounter, 0 mSdLazyCounter, 3367 mSolverCounterSat, 1455 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17794.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8110 SdHoareTripleChecker+Valid, 8705 SdHoareTripleChecker+Invalid, 4823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 88.96ms SdHoareTripleChecker+Time, 1455 IncrementalHoareTripleChecker+Valid, 3367 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19966.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:29,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8110 Valid, 8705 Invalid, 4823 Unknown, 0 Unchecked, 88.96ms Time], IncrementalHoareTripleChecker [1455 Valid, 3367 Invalid, 1 Unknown, 0 Unchecked, 19966.15ms Time] [2021-11-12 23:34:29,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7118 states. [2021-11-12 23:34:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7118 to 7082. [2021-11-12 23:34:29,469 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) [2021-11-12 23:34:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7082 states to 7082 states and 9854 transitions. [2021-11-12 23:34:29,592 INFO L78 Accepts]: Start accepts. Automaton has 7082 states and 9854 transitions. Word has length 47 [2021-11-12 23:34:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:29,594 INFO L470 AbstractCegarLoop]: Abstraction has 7082 states and 9854 transitions. [2021-11-12 23:34:29,594 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) [2021-11-12 23:34:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 7082 states and 9854 transitions. [2021-11-12 23:34:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-12 23:34:29,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:29,597 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] [2021-11-12 23:34:29,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:29,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:30,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:30,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:34:30,210 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:30,211 INFO L85 PathProgramCache]: Analyzing trace with hash -264140622, now seen corresponding path program 1 times [2021-11-12 23:34:30,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:34:30,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847637106] [2021-11-12 23:34:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:30,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:34:30,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:34:30,213 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:34:30,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:34:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:31,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:34:31,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:31,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:31,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:34:31,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847637106] [2021-11-12 23:34:31,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847637106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:34:31,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [687636619] [2021-11-12 23:34:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:31,713 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:34:31,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:34:31,714 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:34:31,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:34:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:32,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:34:32,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:34:32,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:34:33,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [687636619] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:34:33,150 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:34:33,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-12 23:34:33,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730648874] [2021-11-12 23:34:33,151 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:34:33,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:34:33,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:34:33,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:34:33,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:34:33,152 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) [2021-11-12 23:34:34,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:34,995 INFO L93 Difference]: Finished difference Result 17071 states and 24365 transitions. [2021-11-12 23:34:34,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:34:34,997 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 [2021-11-12 23:34:34,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:35,110 INFO L225 Difference]: With dead ends: 17071 [2021-11-12 23:34:35,110 INFO L226 Difference]: Without dead ends: 10970 [2021-11-12 23:34:35,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:34:35,135 INFO L933 BasicCegarLoop]: 2196 mSDtfsCounter, 3362 mSDsluCounter, 6042 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 964.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3362 SdHoareTripleChecker+Valid, 8238 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.44ms SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1166.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:35,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3362 Valid, 8238 Invalid, 1115 Unknown, 0 Unchecked, 30.44ms Time], IncrementalHoareTripleChecker [1093 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 1166.98ms Time] [2021-11-12 23:34:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10970 states. [2021-11-12 23:34:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10970 to 7082. [2021-11-12 23:34:35,691 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) [2021-11-12 23:34:35,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7082 states to 7082 states and 9850 transitions. [2021-11-12 23:34:35,743 INFO L78 Accepts]: Start accepts. Automaton has 7082 states and 9850 transitions. Word has length 51 [2021-11-12 23:34:35,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:35,744 INFO L470 AbstractCegarLoop]: Abstraction has 7082 states and 9850 transitions. [2021-11-12 23:34:35,745 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) [2021-11-12 23:34:35,746 INFO L276 IsEmpty]: Start isEmpty. Operand 7082 states and 9850 transitions. [2021-11-12 23:34:35,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:34:35,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:35,749 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] [2021-11-12 23:34:35,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:35,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:36,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:34:36,162 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:36,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:36,163 INFO L85 PathProgramCache]: Analyzing trace with hash 3416379, now seen corresponding path program 1 times [2021-11-12 23:34:36,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:34:36,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148730546] [2021-11-12 23:34:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:36,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:34:36,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:34:36,166 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:34:36,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:34:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:37,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:34:37,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:37,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:37,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:34:37,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148730546] [2021-11-12 23:34:37,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148730546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:34:37,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1964965179] [2021-11-12 23:34:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:37,910 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:34:37,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:34:37,921 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:34:37,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 23:34:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:39,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:34:39,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:39,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:40,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1964965179] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:34:40,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932069836] [2021-11-12 23:34:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:40,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:34:40,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:34:40,088 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:34:40,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-12 23:34:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:41,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:34:41,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:41,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:34:41,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932069836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:34:41,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:34:41,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-12 23:34:41,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557338665] [2021-11-12 23:34:41,499 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:34:41,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:34:41,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:34:41,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:34:41,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:34:41,501 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) [2021-11-12 23:34:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:42,027 INFO L93 Difference]: Finished difference Result 14164 states and 19703 transitions. [2021-11-12 23:34:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:34:42,027 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 [2021-11-12 23:34:42,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:42,062 INFO L225 Difference]: With dead ends: 14164 [2021-11-12 23:34:42,062 INFO L226 Difference]: Without dead ends: 7090 [2021-11-12 23:34:42,091 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 [2021-11-12 23:34:42,094 INFO L933 BasicCegarLoop]: 1470 mSDtfsCounter, 7 mSDsluCounter, 4404 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 5874 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.25ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:42,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 5874 Invalid, 35 Unknown, 0 Unchecked, 11.25ms Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 125.55ms Time] [2021-11-12 23:34:42,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7090 states. [2021-11-12 23:34:42,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7090 to 7090. [2021-11-12 23:34:42,598 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) [2021-11-12 23:34:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7090 states to 7090 states and 9858 transitions. [2021-11-12 23:34:42,633 INFO L78 Accepts]: Start accepts. Automaton has 7090 states and 9858 transitions. Word has length 60 [2021-11-12 23:34:42,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:42,634 INFO L470 AbstractCegarLoop]: Abstraction has 7090 states and 9858 transitions. [2021-11-12 23:34:42,634 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) [2021-11-12 23:34:42,634 INFO L276 IsEmpty]: Start isEmpty. Operand 7090 states and 9858 transitions. [2021-11-12 23:34:42,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:34:42,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:42,639 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] [2021-11-12 23:34:42,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:42,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-12 23:34:43,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-12 23:34:43,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:34:43,259 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:43,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:43,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1514861259, now seen corresponding path program 2 times [2021-11-12 23:34:43,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:34:43,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125987746] [2021-11-12 23:34:43,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:34:43,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:34:43,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:34:43,262 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:34:43,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:34:44,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-12 23:34:44,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:34:44,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:34:44,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:34:44,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:34:45,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:34:45,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125987746] [2021-11-12 23:34:45,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125987746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:34:45,702 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:34:45,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-12 23:34:45,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153067877] [2021-11-12 23:34:45,702 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:34:45,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:34:45,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:34:45,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:34:45,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:34:45,703 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) [2021-11-12 23:35:08,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:08,761 INFO L93 Difference]: Finished difference Result 19973 states and 28496 transitions. [2021-11-12 23:35:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:35:08,763 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 [2021-11-12 23:35:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:08,825 INFO L225 Difference]: With dead ends: 19973 [2021-11-12 23:35:08,826 INFO L226 Difference]: Without dead ends: 12906 [2021-11-12 23:35:08,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:35:08,857 INFO L933 BasicCegarLoop]: 3357 mSDtfsCounter, 3130 mSDsluCounter, 17133 mSDsCounter, 0 mSdLazyCounter, 3211 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19092.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3324 SdHoareTripleChecker+Valid, 20490 SdHoareTripleChecker+Invalid, 4129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 92.82ms SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 3211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21614.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:08,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3324 Valid, 20490 Invalid, 4129 Unknown, 0 Unchecked, 92.82ms Time], IncrementalHoareTripleChecker [918 Valid, 3211 Invalid, 0 Unknown, 0 Unchecked, 21614.30ms Time] [2021-11-12 23:35:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12906 states. [2021-11-12 23:35:09,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12906 to 7088. [2021-11-12 23:35:09,606 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) [2021-11-12 23:35:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7088 states to 7088 states and 9844 transitions. [2021-11-12 23:35:09,636 INFO L78 Accepts]: Start accepts. Automaton has 7088 states and 9844 transitions. Word has length 68 [2021-11-12 23:35:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:09,638 INFO L470 AbstractCegarLoop]: Abstraction has 7088 states and 9844 transitions. [2021-11-12 23:35:09,638 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) [2021-11-12 23:35:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand 7088 states and 9844 transitions. [2021-11-12 23:35:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-12 23:35:09,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:09,645 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] [2021-11-12 23:35:09,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:09,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:09,858 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:09,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:09,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1734922365, now seen corresponding path program 1 times [2021-11-12 23:35:09,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:09,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270686140] [2021-11-12 23:35:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:09,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:09,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:09,861 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:09,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:35:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:10,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:35:10,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:35:11,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:35:12,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:12,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270686140] [2021-11-12 23:35:12,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270686140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:35:12,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [41551332] [2021-11-12 23:35:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:12,038 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:35:12,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:35:12,039 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:35:12,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:35:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:12,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:35:12,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:35:13,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:35:13,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [41551332] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:13,574 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:35:13,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 9] total 18 [2021-11-12 23:35:13,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295444882] [2021-11-12 23:35:13,574 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:13,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:35:13,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:13,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:35:13,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:35:13,576 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) [2021-11-12 23:35:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:15,986 INFO L93 Difference]: Finished difference Result 22747 states and 32928 transitions. [2021-11-12 23:35:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:35:15,987 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 [2021-11-12 23:35:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:16,058 INFO L225 Difference]: With dead ends: 22747 [2021-11-12 23:35:16,058 INFO L226 Difference]: Without dead ends: 15682 [2021-11-12 23:35:16,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:35:16,091 INFO L933 BasicCegarLoop]: 2337 mSDtfsCounter, 1756 mSDsluCounter, 2068 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1187.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2145 SdHoareTripleChecker+Valid, 4405 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.51ms SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1384.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:16,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2145 Valid, 4405 Invalid, 412 Unknown, 0 Unchecked, 12.51ms Time], IncrementalHoareTripleChecker [217 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 1384.71ms Time] [2021-11-12 23:35:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15682 states. [2021-11-12 23:35:17,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15682 to 15670. [2021-11-12 23:35:17,685 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) [2021-11-12 23:35:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15670 states to 15670 states and 23070 transitions. [2021-11-12 23:35:17,768 INFO L78 Accepts]: Start accepts. Automaton has 15670 states and 23070 transitions. Word has length 80 [2021-11-12 23:35:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:17,769 INFO L470 AbstractCegarLoop]: Abstraction has 15670 states and 23070 transitions. [2021-11-12 23:35:17,769 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) [2021-11-12 23:35:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 15670 states and 23070 transitions. [2021-11-12 23:35:17,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-12 23:35:17,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:17,776 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] [2021-11-12 23:35:17,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:18,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-12 23:35:18,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:18,185 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:18,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash -701396988, now seen corresponding path program 1 times [2021-11-12 23:35:18,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:18,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680496127] [2021-11-12 23:35:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:18,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:18,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:18,189 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:18,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:35:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:19,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:35:19,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:35:19,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:35:20,453 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:20,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680496127] [2021-11-12 23:35:20,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680496127] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:35:20,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [260638955] [2021-11-12 23:35:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:20,453 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:35:20,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:35:20,454 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:35:20,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 23:35:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:22,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:35:22,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:35:22,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:35:22,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [260638955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:35:22,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913269228] [2021-11-12 23:35:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:22,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:35:22,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:35:22,826 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:35:22,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-12 23:35:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:23,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:35:23,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:35:24,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:35:24,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913269228] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:24,302 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:35:24,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 9, 9, 9] total 20 [2021-11-12 23:35:24,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157925541] [2021-11-12 23:35:24,302 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:24,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:35:24,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:24,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:35:24,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:35:24,304 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) [2021-11-12 23:35:27,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:27,802 INFO L93 Difference]: Finished difference Result 25454 states and 38110 transitions. [2021-11-12 23:35:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:35:27,803 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 [2021-11-12 23:35:27,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:27,923 INFO L225 Difference]: With dead ends: 25454 [2021-11-12 23:35:27,924 INFO L226 Difference]: Without dead ends: 25446 [2021-11-12 23:35:27,935 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 [2021-11-12 23:35:27,936 INFO L933 BasicCegarLoop]: 2903 mSDtfsCounter, 2113 mSDsluCounter, 6752 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1568.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2357 SdHoareTripleChecker+Valid, 9655 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.12ms SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1836.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:27,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2357 Valid, 9655 Invalid, 853 Unknown, 0 Unchecked, 24.12ms Time], IncrementalHoareTripleChecker [604 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1836.49ms Time] [2021-11-12 23:35:27,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25446 states. [2021-11-12 23:35:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25446 to 15682. [2021-11-12 23:35:29,890 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) [2021-11-12 23:35:29,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15682 states to 15682 states and 23086 transitions. [2021-11-12 23:35:29,958 INFO L78 Accepts]: Start accepts. Automaton has 15682 states and 23086 transitions. Word has length 78 [2021-11-12 23:35:29,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:29,960 INFO L470 AbstractCegarLoop]: Abstraction has 15682 states and 23086 transitions. [2021-11-12 23:35:29,960 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) [2021-11-12 23:35:29,960 INFO L276 IsEmpty]: Start isEmpty. Operand 15682 states and 23086 transitions. [2021-11-12 23:35:29,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 23:35:29,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:29,968 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] [2021-11-12 23:35:29,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-12 23:35:30,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:30,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:30,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:35:30,588 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash -83361928, now seen corresponding path program 1 times [2021-11-12 23:35:30,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:30,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499956021] [2021-11-12 23:35:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:30,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:30,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:30,592 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:30,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:35:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:31,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:35:31,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:35:32,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:35:32,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:32,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499956021] [2021-11-12 23:35:32,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499956021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:35:32,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1148789008] [2021-11-12 23:35:32,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:32,922 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:35:32,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:35:32,923 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:35:32,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 23:35:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:33,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:35:33,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:35:34,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:35:34,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1148789008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:34,399 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:35:34,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 9] total 20 [2021-11-12 23:35:34,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963092385] [2021-11-12 23:35:34,399 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:34,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:35:34,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:34,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:35:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:35:34,401 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) [2021-11-12 23:35:37,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:37,854 INFO L93 Difference]: Finished difference Result 27056 states and 39532 transitions. [2021-11-12 23:35:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:35:37,856 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 [2021-11-12 23:35:37,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:37,904 INFO L225 Difference]: With dead ends: 27056 [2021-11-12 23:35:37,905 INFO L226 Difference]: Without dead ends: 11397 [2021-11-12 23:35:37,951 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 [2021-11-12 23:35:37,952 INFO L933 BasicCegarLoop]: 2412 mSDtfsCounter, 3120 mSDsluCounter, 2750 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2079.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 5162 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.87ms SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2374.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:37,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3519 Valid, 5162 Invalid, 1016 Unknown, 0 Unchecked, 18.87ms Time], IncrementalHoareTripleChecker [598 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 2374.84ms Time] [2021-11-12 23:35:37,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11397 states. [2021-11-12 23:35:39,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11397 to 11391. [2021-11-12 23:35:39,037 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) [2021-11-12 23:35:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11391 states to 11391 states and 16445 transitions. [2021-11-12 23:35:39,095 INFO L78 Accepts]: Start accepts. Automaton has 11391 states and 16445 transitions. Word has length 82 [2021-11-12 23:35:39,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:39,096 INFO L470 AbstractCegarLoop]: Abstraction has 11391 states and 16445 transitions. [2021-11-12 23:35:39,097 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) [2021-11-12 23:35:39,097 INFO L276 IsEmpty]: Start isEmpty. Operand 11391 states and 16445 transitions. [2021-11-12 23:35:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 23:35:39,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:39,108 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] [2021-11-12 23:35:39,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-12 23:35:39,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:39,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:35:39,522 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:39,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:39,523 INFO L85 PathProgramCache]: Analyzing trace with hash -615479672, now seen corresponding path program 1 times [2021-11-12 23:35:39,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:39,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950851824] [2021-11-12 23:35:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:39,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:39,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:39,527 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:39,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:35:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:40,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:35:40,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:35:41,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:35:42,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:42,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950851824] [2021-11-12 23:35:42,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950851824] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:35:42,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1999062976] [2021-11-12 23:35:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:42,223 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:35:42,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:35:42,225 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:35:42,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 23:35:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:42,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:35:42,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 23:35:43,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-12 23:35:44,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1999062976] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:44,115 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:35:44,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9, 9] total 20 [2021-11-12 23:35:44,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811303588] [2021-11-12 23:35:44,116 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:44,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:35:44,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:35:44,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:35:44,118 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) [2021-11-12 23:35:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:45,849 INFO L93 Difference]: Finished difference Result 22822 states and 32941 transitions. [2021-11-12 23:35:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:35:45,849 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 [2021-11-12 23:35:45,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:45,889 INFO L225 Difference]: With dead ends: 22822 [2021-11-12 23:35:45,889 INFO L226 Difference]: Without dead ends: 11454 [2021-11-12 23:35:45,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 381 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:35:45,914 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 25 mSDsluCounter, 4396 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 5864 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.75ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:45,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 5864 Invalid, 14 Unknown, 0 Unchecked, 13.75ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 60.39ms Time] [2021-11-12 23:35:45,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11454 states. [2021-11-12 23:35:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11454 to 11405. [2021-11-12 23:35:47,067 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) [2021-11-12 23:35:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11405 states to 11405 states and 16459 transitions. [2021-11-12 23:35:47,120 INFO L78 Accepts]: Start accepts. Automaton has 11405 states and 16459 transitions. Word has length 101 [2021-11-12 23:35:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:47,121 INFO L470 AbstractCegarLoop]: Abstraction has 11405 states and 16459 transitions. [2021-11-12 23:35:47,121 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) [2021-11-12 23:35:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 11405 states and 16459 transitions. [2021-11-12 23:35:47,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 23:35:47,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:47,133 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] [2021-11-12 23:35:47,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:47,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-12 23:35:47,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:35:47,558 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:47,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:47,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1696642470, now seen corresponding path program 1 times [2021-11-12 23:35:47,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:47,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712685379] [2021-11-12 23:35:47,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:47,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:47,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:47,562 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:47,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:35:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:48,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:35:48,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:35:49,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:35:50,097 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:50,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712685379] [2021-11-12 23:35:50,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712685379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:35:50,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1994349237] [2021-11-12 23:35:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:50,098 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:35:50,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:35:50,113 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:35:50,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 23:35:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:51,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:35:51,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:35:52,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:35:52,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1994349237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:35:52,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109474041] [2021-11-12 23:35:52,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:52,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:35:52,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:35:52,679 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:35:52,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-12 23:35:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:53,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:35:53,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:35:53,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:35:54,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109474041] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:54,358 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:35:54,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 9, 9, 9] total 20 [2021-11-12 23:35:54,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065788439] [2021-11-12 23:35:54,358 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:54,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:35:54,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:54,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:35:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:35:54,359 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) [2021-11-12 23:35:55,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:55,131 INFO L93 Difference]: Finished difference Result 22141 states and 31903 transitions. [2021-11-12 23:35:55,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:35:55,132 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 [2021-11-12 23:35:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:55,169 INFO L225 Difference]: With dead ends: 22141 [2021-11-12 23:35:55,169 INFO L226 Difference]: Without dead ends: 10747 [2021-11-12 23:35:55,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:35:55,199 INFO L933 BasicCegarLoop]: 1484 mSDtfsCounter, 25 mSDsluCounter, 2949 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 4433 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.39ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:55,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 4433 Invalid, 13 Unknown, 0 Unchecked, 6.39ms Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 29.50ms Time] [2021-11-12 23:35:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10747 states. [2021-11-12 23:35:55,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10747 to 10729. [2021-11-12 23:35:55,994 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) [2021-11-12 23:35:56,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10729 states to 10729 states and 15431 transitions. [2021-11-12 23:35:56,050 INFO L78 Accepts]: Start accepts. Automaton has 10729 states and 15431 transitions. Word has length 102 [2021-11-12 23:35:56,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:56,050 INFO L470 AbstractCegarLoop]: Abstraction has 10729 states and 15431 transitions. [2021-11-12 23:35:56,051 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) [2021-11-12 23:35:56,051 INFO L276 IsEmpty]: Start isEmpty. Operand 10729 states and 15431 transitions. [2021-11-12 23:35:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 23:35:56,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:56,058 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] [2021-11-12 23:35:56,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:56,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:56,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:56,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:35:56,682 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:56,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:56,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2109244067, now seen corresponding path program 1 times [2021-11-12 23:35:56,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:56,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321182103] [2021-11-12 23:35:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:56,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:56,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:56,686 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:56,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:35:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:57,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:35:57,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:35:58,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:35:59,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:59,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321182103] [2021-11-12 23:35:59,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321182103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:35:59,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1397802410] [2021-11-12 23:35:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:59,149 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:35:59,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:35:59,150 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:35:59,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-12 23:35:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:59,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:35:59,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:36:00,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:36:01,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1397802410] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:01,115 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:36:01,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [9, 9] total 17 [2021-11-12 23:36:01,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719118736] [2021-11-12 23:36:01,116 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:01,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:36:01,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:36:01,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:36:01,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:36:01,118 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) [2021-11-12 23:36:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:01,888 INFO L93 Difference]: Finished difference Result 21396 states and 30771 transitions. [2021-11-12 23:36:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:36:01,888 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 [2021-11-12 23:36:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:01,917 INFO L225 Difference]: With dead ends: 21396 [2021-11-12 23:36:01,917 INFO L226 Difference]: Without dead ends: 10690 [2021-11-12 23:36:01,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:36:01,945 INFO L933 BasicCegarLoop]: 1464 mSDtfsCounter, 1397 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1397 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:01,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1397 Valid, 1464 Invalid, 1 Unknown, 0 Unchecked, 3.71ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 3.28ms Time] [2021-11-12 23:36:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10690 states. [2021-11-12 23:36:02,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10690 to 10690. [2021-11-12 23:36:02,771 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) [2021-11-12 23:36:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10690 states to 10690 states and 15353 transitions. [2021-11-12 23:36:02,807 INFO L78 Accepts]: Start accepts. Automaton has 10690 states and 15353 transitions. Word has length 98 [2021-11-12 23:36:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:02,808 INFO L470 AbstractCegarLoop]: Abstraction has 10690 states and 15353 transitions. [2021-11-12 23:36:02,808 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) [2021-11-12 23:36:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 10690 states and 15353 transitions. [2021-11-12 23:36:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 23:36:02,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:02,817 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] [2021-11-12 23:36:02,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:03,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:03,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:36:03,242 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:03,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:03,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1158141034, now seen corresponding path program 1 times [2021-11-12 23:36:03,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:36:03,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028463440] [2021-11-12 23:36:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:03,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:36:03,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:36:03,245 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:36:03,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:36:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:04,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:36:04,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:36:04,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:36:05,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:36:05,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028463440] [2021-11-12 23:36:05,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028463440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:36:05,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [913168913] [2021-11-12 23:36:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:05,632 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:36:05,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:36:05,634 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:36:05,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-12 23:36:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:07,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:36:07,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:36:07,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:36:08,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [913168913] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:36:08,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943215788] [2021-11-12 23:36:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:08,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:36:08,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:36:08,215 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:36:08,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-12 23:36:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:09,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:36:09,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:36:09,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:36:10,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943215788] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:36:10,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:36:10,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-12 23:36:10,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122439116] [2021-11-12 23:36:10,072 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:36:10,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:36:10,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:36:10,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:36:10,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:36:10,075 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) [2021-11-12 23:36:11,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:11,853 INFO L93 Difference]: Finished difference Result 21380 states and 30713 transitions. [2021-11-12 23:36:11,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:36:11,854 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 [2021-11-12 23:36:11,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:11,881 INFO L225 Difference]: With dead ends: 21380 [2021-11-12 23:36:11,881 INFO L226 Difference]: Without dead ends: 10706 [2021-11-12 23:36:11,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:36:11,905 INFO L933 BasicCegarLoop]: 1463 mSDtfsCounter, 14 mSDsluCounter, 11688 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 501.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 13151 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.93ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 559.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:11,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 13151 Invalid, 140 Unknown, 0 Unchecked, 14.93ms Time], IncrementalHoareTripleChecker [14 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 559.34ms Time] [2021-11-12 23:36:11,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10706 states. [2021-11-12 23:36:12,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10706 to 10706. [2021-11-12 23:36:12,712 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) [2021-11-12 23:36:12,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10706 states to 10706 states and 15369 transitions. [2021-11-12 23:36:12,750 INFO L78 Accepts]: Start accepts. Automaton has 10706 states and 15369 transitions. Word has length 106 [2021-11-12 23:36:12,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:12,751 INFO L470 AbstractCegarLoop]: Abstraction has 10706 states and 15369 transitions. [2021-11-12 23:36:12,751 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) [2021-11-12 23:36:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 10706 states and 15369 transitions. [2021-11-12 23:36:12,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:36:12,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:12,761 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] [2021-11-12 23:36:12,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:13,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:13,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:13,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:36:13,386 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:13,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:13,387 INFO L85 PathProgramCache]: Analyzing trace with hash -216086858, now seen corresponding path program 2 times [2021-11-12 23:36:13,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:36:13,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542217775] [2021-11-12 23:36:13,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:36:13,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:36:13,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:36:13,389 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:36:13,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:36:54,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:36:54,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:36:55,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:36:55,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:36:56,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:36:58,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:36:58,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542217775] [2021-11-12 23:36:58,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542217775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:36:58,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [872845755] [2021-11-12 23:36:58,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:36:58,194 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:36:58,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:36:58,195 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:36:58,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-12 23:38:13,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:38:13,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:38:13,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:38:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:38:14,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:38:14,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [872845755] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:14,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591252872] [2021-11-12 23:38:14,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:38:14,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:14,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:14,627 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:38:14,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-12 23:38:50,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:38:50,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:38:50,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:38:50,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:38:51,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:38:51,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591252872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:51,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:38:51,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 32 [2021-11-12 23:38:51,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985492993] [2021-11-12 23:38:51,760 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:38:51,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 23:38:51,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:51,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 23:38:51,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-11-12 23:38:51,763 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) [2021-11-12 23:38:56,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:56,976 INFO L93 Difference]: Finished difference Result 21412 states and 30753 transitions. [2021-11-12 23:38:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-12 23:38:56,976 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 [2021-11-12 23:38:56,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:57,000 INFO L225 Difference]: With dead ends: 21412 [2021-11-12 23:38:57,001 INFO L226 Difference]: Without dead ends: 10738 [2021-11-12 23:38:57,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-11-12 23:38:57,021 INFO L933 BasicCegarLoop]: 1463 mSDtfsCounter, 31 mSDsluCounter, 21915 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1611.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 23378 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.57ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1818.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:57,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 23378 Invalid, 539 Unknown, 0 Unchecked, 19.57ms Time], IncrementalHoareTripleChecker [30 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 1818.69ms Time] [2021-11-12 23:38:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10738 states. [2021-11-12 23:38:57,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10738 to 10738. [2021-11-12 23:38:57,609 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) [2021-11-12 23:38:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10738 states to 10738 states and 15401 transitions. [2021-11-12 23:38:57,640 INFO L78 Accepts]: Start accepts. Automaton has 10738 states and 15401 transitions. Word has length 122 [2021-11-12 23:38:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:57,641 INFO L470 AbstractCegarLoop]: Abstraction has 10738 states and 15401 transitions. [2021-11-12 23:38:57,641 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) [2021-11-12 23:38:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 10738 states and 15401 transitions. [2021-11-12 23:38:57,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 23:38:57,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:57,649 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] [2021-11-12 23:38:57,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:57,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:58,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:58,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:58,274 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:58,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:58,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2015544074, now seen corresponding path program 3 times [2021-11-12 23:38:58,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:58,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075072573] [2021-11-12 23:38:58,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:38:58,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:58,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:58,277 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:58,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 23:40:19,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-11-12 23:40:19,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:40:19,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-12 23:40:19,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:40:22,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:40:29,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:29,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075072573] [2021-11-12 23:40:29,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075072573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:29,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1980227653] [2021-11-12 23:40:29,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:40:29,488 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:29,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:40:29,491 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:40:29,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-12 23:44:51,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-11-12 23:44:51,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:44:51,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-12 23:44:51,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:44:52,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:44:53,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1980227653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:44:53,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492963029] [2021-11-12 23:44:53,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:44:53,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:44:53,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:44:53,545 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:44:53,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_317ab6c5-9847-4b4e-a7c8-a421ff226ebf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process